单选题If the ratio of the area of a sector to the area of the circle is 2：3. what is the ratio of the length of the arc in the sector to the circumference of the circle?A 3/2B 2/3C 4/9D 1/4E 9/4
题目
单选题
If the ratio of the area of a sector to the area of the circle is 2：3. what is the ratio of the length of the arc in the sector to the circumference of the circle?
A
3/2
B
2/3
C
4/9
D
1/4
E
9/4