Question

Find the total area of the four walls of a room . Dimensions: 7 m long, 5 m wide and 3 m high. [Hint: There are 2 walls, 7 m by 3 m and 2 walls, 5 m by 3 m.
So, the area of the 4 walls = 2(7*3+5*3)=2*3 (7+5) sq m
Formula: Area of 4 walls = 2(l+b)*h]

Answer 1

Answer:

2(l+b)×h

2(7m+5m)×3m

2(12m)×3m

24m×3m

72m²