Question

Harish wants to make a cover for the cube having side 5 cm which covers the sides but not the top and bottom. The area of cover he will be needing is

• A. $75c{m}^2$
• B. $100c{m}^2$
• C. $125c{m}^2$
• D. $50c{m}^2$

Answer 1

The correct option is B

$100c{m}^2$

Given: A cube of side 5 cm.
Harish wants to cover only the sides, not the top and bottom, so area of cover required will be equal to the lateral surface area of the cube.

$\therefore$ Area of required cover = curve surface area of the cube

$=4a^2$
$=4(5{)}^2=100$