Question

Area of 4 walls in a room is 77 m square the length and breadth of the room are 7.5 m and 3.5 m respectively . Find the height of the room

Answer 1

Area of 4 wall = 2(l+b) ×h = 77 m²

l=7.5m

b=3.5 m

=> 2(7.5 +3.5) ×h= 77 m²

=> 2 × 11 × h= 77 m²

=> h = 3.5 metres

Answer 2

Area of 4 walls=2(l+b)×h

length=7.5m

breadth=3.5m

Let the height be x m

Area of 4walls=2(7.5+3.5)× x

2×11 × x

22x m^2

but..area is given 77m^2

22x=77

x=77/22

x=7/2 =3.5m

The height of the room is 3.5m

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