Question

The area of the four walls of a room is 156 m2. The breadth and height of the room are 8 m and 6 m

respectively. Find the length of the room.​

Answer 1

Given: Lateral Surface area=156m
Breadth=8m height=6m
⇒ L.S.A=2(bh+lh)=2(l+b)h
⇒156=2(l+8)h
⇒156=2(l+8)×6
⇒l+8=
12
156
​
=13
∴l=13−8=5m
Hence, length of the room=5m