Question

Two cubes have their volumes in the ratio 1:27. The ratio of their surface areas is

(a)1:3 (b)1:9 (c)1:27 (d)none of these

Answer 1

(b)1:9

Explanation:

Volume in the ratio 1:27

1/27 = 1/3= a³/b³

b/a = 3

Therefore on squaring 1:9