Question

A room is 5.5 m long, 2.5 m wide and 3.5 m high. Find the area of the four walls of the room.

Answer 1

Given: Length l = 5.5 m, Width b = 2.5 m, Height h = 3.5 m.

Step-wise calculation:

1. Sum length and width:

l + b 

= 5.5 + 2.5 

= 8.0 m

2. Twice that perimeter factor: 

2(l + b)

= 2 × 8.0

= 16.0 m

3. Multiply by height:

Area = 16.0 × 3.5

= 56.0 m²

Area of the four walls = 56 m².