单选题The length of a rectangular kitchen floor is 3 feet more than its width, if the length of the floor is 12 feet, what is the area of the floor in square feet?A 9B 15C 42D 108E 44

题目
单选题
The length of a rectangular kitchen floor is 3 feet more than its width, if the length of the floor is 12 feet, what is the area of the floor in square feet?
A

9

B

15

C

42

D

108

E

44

相似考题

1.Tomas plans to construct a circular fishpond with a diameter of 9 ft. Which of the following is closest to the length, in feet, of the decorative fencing that Tomas needs to enclose the fishpond along its perimeter?A.15B.19C.29D.64E.255

2.Which of the following is the MAXIMUM cable length for 802.3 Ethernet?()A. 33 Feet (10 meters)B. 100 Feet (30 meters)C. 328 Feet (100 meters)D. 1200 Feet (366 meters)

3.The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at ______．A.safe speed only specifiedB.not less than 120 feet per minuteC.not more than 120 feet per minuteD.not more than 90 feet per minute

4.The boat is as long as 20 feet in ________ and 6 meters in width.A. deepB. lengthC. longD. square

更多“单选题The length of a rectangular kitchen floor is 3 feet more than its width, if the length of the floor is 12 feet, what is the area of the floor in square feet?A 9B 15C 42D 108E 44”相关问题

  • 第1题：

    Which of the following is the MAXIMUM cable length for 802.3 Ethernet?（）

    • A、33 Feet (10 meters)
    • B、100 Feet (30 meters)
    • C、328 Feet (100 meters)
    • D、1200 Feet (366 meters)

    正确答案:C

  • 第2题：

    What is the recommended distance between controller-based access points for support ofroaming？（）

    • A、50 feet [15 meters]
    • B、200 feet [60 meters]
    • C、150 feet [45 meters]
    • D、100 feet [30 meters]

    正确答案:D

  • 第3题：

    单选题
    If one pair of opposite sides of a square are increased in length by 20% and the other pair of sides are increased in length by 50%, by what percent is the area of the rectangle that results greater than the area of the original square?
    A

    10%

    B

    50%

    C

    70%

    D

    75%

    E

    80%


    正确答案： E
    解析：
    Suppose the length of a side of the original square is 10; then the area of that square is 10×10 or 100. Since one pair of opposite sides of the square are increased in length by 20%, and 20% of 10 is 2, the length of that pair of opposite sides of the new rectangle is 10+2 or 12. Since the other pair of sides are increased in length by 50%, and 50% of 10 is 5, the length of the other pair of opposite sides of the new rectangle is 10+5 or 15. The area of the new rectangle formed is 12×15 or 180, which is 80% greater than 100, the area of the original square.

  • 第4题：

    单选题
    The total of such areas gets divided _______ between the total number of flats per floor: the larger the number of flats per floor, the lesser is this area _______ gets added to the area of the flat.
    A

    sufficiently; where

    B

    proportionately; that

    C

    equally; as

    D

    adequately; when


    正确答案： B
    解析：
    每层楼的公寓数量和其面积成反比：公寓数量越多，公寓的面积就越小。proportionately成比例地，另外area后面是一个定语从句用来修饰它。sufficiently足够地。equally平等地。adequately足够地。

  • 第5题：

    问答题
    A rectangle is equal in area to a square with sides of length 12. Is the diagonal of the rectangle greater in length than 20?　　(1) The rectangle has a length of 16.　　(2) The rectangle has a width of 9.

    正确答案： D
    解析：
    通过计算可知，若长方形长为16或宽为9，面积为144，其对角线长度均小于20，故本题选D项。

  • 第6题：

    单选题
    The minimum length of a boat painter for a lifeboat in ocean service is（）.
    A

    60 fathoms

    B

    the distance from the main deck to the light waterline

    C

    twice the distance from the main deck to the light waterline or 50 feet whichever is greater

    D

    two times the distance from the boat deck to the light waterline or 50 feet whichever is greater


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    According to the passage, airline travelers should keep their feet flat on the floor ______.
    A

    throughout the flight

    B

    during takeoffs and s

    C

    especially during landings

    D

    in case of an accident


    正确答案： A
    解析：
    文章首段指出乘飞机时，人们可通过学习和遵守某些指示来增加存活的可能性。其中该段倒数第二句指出在takeoffs（起飞）和landings（登陆）的过程中，乘客应该“keep your feet flat on the floor”，因此B项符合题意。

  • 第8题：

    单选题
    Which of the following is the MAXIMUM cable length for 802.3 Ethernet?（）
    A

    33 Feet (10 meters)

    B

    100 Feet (30 meters)

    C

    328 Feet (100 meters)

    D

    1200 Feet (366 meters)


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    What is the best guide for determining the proper scope of anchor chain to use for anchoring in normal conditions?（）
    A

    One shot of chain for every ten feet of water

    B

    One shot of chain for every fifteen feet of water

    C

    One shot of chain for every thirty feet of water

    D

    One shot of chain for every ninety feet of water


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    What is the recommended distance between controller-based access points for support ofroaming？（）
    A

    50 feet [15 meters]

    B

    200 feet [60 meters]

    C

    150 feet [45 meters]

    D

    100 feet [30 meters]


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    The width of a rectangular prism is doubled, its length is tripled, and its height is cut in half. If the volume of the original prism was V, what is its new volume?
    A

    2V

    B

    4V

    C

    16V

    D

    6V

    E

    3V


    正确答案： B
    解析：
    The volume of the original prism was V=l×w×h. The volume of the new prism is
    V=2×3w×(1/2)h=3l×w×h=3V.

  • 第12题：

    单选题
    A rectangular fish tank has a base 2 feet wide and 3 feet long. When the tank is partially filled with water, a solid cube with an edge length of 1 foot is placed in the tank. If no overflow of water from the tank is assumed, by how many inches will the level of the water in the tank rise when the cube becomes completely submerged?
    A

    1/6

    B

    1/2

    C

    2

    D

    3

    E

    4


    正确答案： C
    解析：
    When a solid cube with an edge length of 1 foot is placed in the fish tank, it displaces a volume of water that is equal to the volume of the cube, which is 1×1×1 or 1 cubic foot. If h represents the change in the number of feet in the height of the water in the fish tank, then
    Volume of displaced water = 2×3 ×h = 1
    h = 1/6 foot
    Hence, the number of inches the level of the water in the tank will rise is 1/6 ×12 or 2.

  • 第13题：

    Which three items does the Cisco WCS Planning Tool Generate Proposal Report provide？（） 

    • A、access point position， in feet， from a corner of the floor plan
    • B、SNR coverage map for 802.11a/n
    • C、data rate map for 802.11a/n
    • D、percent of coverage by signal

    正确答案:A,C

  • 第14题：

    单选题
    If the area of a square with sides of length 8 centimeters is equal to the area of a rectangle with a width of 4 centimeters, what is the length of the rectangle, in centimeters?
    A

    4

    B

    8

    C

    12

    D

    16

    E

    18


    正确答案： A
    解析：
    设长方形长为x，故4x=8×8，x=16，故本题选D项。

  • 第15题：

    单选题
    The length of a rectangle is 5 more than the side of a square, and the width of the rectangle is 5 less than the side of the square. If the area of the square is 45, what is the area of the rectangle?
    A

    20

    B

    25

    C

    45

    D

    50

    E

    70


    正确答案： D
    解析：
    设正方形的边长为x，那么根据题意有x2=45，所以矩形的面积为 (x+5)(x-5) =x2-25=45-25=20。

  • 第16题：

    问答题
    A CEO is building an extra-wide garage in which to park his limousines. The garage is x feet wide, and at least two feet of space is required between each two cars and between the cars and the walls. Will all nine limousines fit in the garage?　　(1) The average width of the limousines is the square root of x.　　(2) x=100.

    正确答案： C
    解析：
    条件1中没有提到x的值；条件2中没有涉及车的宽度，故将两个条件综合可以计算出答案，故本题选C项。

  • 第17题：

    单选题
    It is a three-storey house and the kitchen is on the______floor.
    A

    ground

    B

    earth

    C

    soil

    D

    land


    正确答案： A
    解析：

  • 第18题：

    单选题
    What is the term for the space that exists above a drop ceiling or below a raised floor and that isused for air return？（）
    A

    NEMA area

    B

    plenum area

    C

    DAS area

    D

    extended area

    E

    RF special area


    正确答案： E
    解析： 暂无解析

  • 第19题：

    单选题
    An amusement park ride has an elevator that brings riders to the top of a tower. Riders step off the elevator onto a straight slide, which leads from the top of the tower to level ground. The base of the slide is 400 feet from the base of the tower and the length of the slide is 500 feet. If the elevator rises at a rate of 10 feet per second, how many seconds does the elevator take to rise from the ground to the top of the slide?
    A

    30

    B

    40

    C

    50

    D

    150

    E

    300


    正确答案： B
    解析：
    因为塔，地面和滑梯形成一个直角三角形，根据勾股定理可以得出a2+(400)2＝(500)2，a=300，也就是滑梯的高，因为电梯的速度为每秒10英尺，所以10t=300，所以需要30秒的时间。

  • 第20题：

    单选题
    The Vessel Bridge-to-Bridge Radiotelephone Act applies to（）.
    A

    every towing vessel of 16 feet or over in length while navigating

    B

    every vessel of 50 GT and upward，carrying one or more persons for hire

    C

    all aircraft operating on the water

    D

    every power-driven vessel of 20 meters and upward while navigating


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Camber，in a ship，is usually measured in（）.
    A

    feet per feet of breadth

    B

    feet per feet of length

    C

    inches per feet of breadth

    D

    inches per feet of length


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at（）.
    A

    safe speed only specified

    B

    not less than 120 feet per minute

    C

    not more than 120 feet per minute

    D

    not more than 90 feet per minute


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    A solid metal cube of edge 3 feet is placed in a rectangular tank whose length, width, and height are 3, 4, and 5 feet, respectively. What is the volume, in cubic feet, of water that the tank can now hold?
    A

    20

    B

    27

    C

    33

    D

    48

    E

    60


    正确答案： B
    解析：
    根据题意，长方体水槽的体积为3×4×5 =60立方英尺，而立方体占的面积为 33 =27 立方英尺，所以如今水槽的储水量为 60-27 =33 立方英尺。

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