Question

If the volume of a cube is 343 cm${}^3$, then its surface area is ___

• A. 284 cm${}^2$
• B. 384 cm${}^2$
• C. 394 cm${}^2$
• D. 294 cm${}^2$

Answer 1

The correct option is D

294 cm${}^2$

Given, volume of the cube = 343 cm${}^3$
Let, the side of the cube be 'a' cm.
$\Rightarrow$ a${}^3$= 343 cm${}^3$
$\Rightarrow$ a = 7 cm

Surface area of the cube = 6a${}^2$
= 6(7)${}^2$
= 294 cm${}^2$