Question

Sachin wants to make a pet house for his dog with length, breadth, and height of 3 m, 2 m, and 1 m respectively. What is the area of walls inside the pet house that has to be painted?

• A. $20m^2$
• B. $15m^2$
• C. $10m^2$
• D. $25m^2$

Answer 1

The correct option is C

$10m^2$

Given
$l=3,b=2,h=1$
Since he wants to paint only the wall of the house and not the roof, we need to find the area of walls.

Area of the walls = Lateral surface area of the pet house
$=2h(l+b)$
$=2\times 1\times (3+2)$
$=10m^2$