单选题A circle has an area of A, A second circle has a diameter four times that of the first circle. What is the area of the second circle?A 2AB 4AC 8AD 16AE 32A
题目
单选题
A circle has an area of A, A second circle has a diameter four times that of the first circle. What is the area of the second circle?
A
2A
B
4A
C
8A
D
16A
E
32A