Question

A room school is 12m long, 8m wide and 5m high. find the area of its four walls.​

Answer 1

Answer:

Length (l)=12m

Height (h)=5m

Width (b)=8m

∴ Area of four walls =2(l+b)h=2(12+8)×5=200m²

Hence, the correct answer is 200m²

.

Answer 2

by seeing the values we can say that it is a cuboid.

area of 4 walls means lateral surface area ( LSA)

Given,

l = 12m

b= 8m

h= 5m

LSA of cuboid = 2h(l+b)

= 2×5(12+8)

= 10(20)

= 200m²

therefore, area of four walls = 200m²