Question

Volumes of two spheres are in the ratio $64:27$. The ratio of their surface areas is

• A. $3:4$
• B. $4:3$
• C. $9:16$
• D. $16:9$

Answer 1

The correct option is D $16:9$

Volume of sphere $=\frac{4}{3}\pi r^3$
Ratio of volumes of two years $=64:27$
Surface area= $4\pi r^2$
$r_1:r_2=4:3$
Surface area of sphere $16:9$