The volumes of two spheres are in the ratio 64 : 125. Then the ratio of their surface areas is:
Answer & explanation
Correct answer: option 3
If the ratio of the volumes of two spheres is given then the ratio of their radius will be equal to the cube root of the volume =
Given,
Ratio of their volume = 64 : 125
Then the ratio of their radius = 4 : 5
Now the ratio of their areas = square of the radius
= 42 : 52 = 16 : 25