Question

The area of the four walls of a room is 77m^2 The length and breadth of the room are 7.5 m and 3.5 m respectively Find the height of the room

Answer 1

we know
area of four walls = 2(l+b)h

77m²= 2(7.5+3.5)h
77= 2(11)h
77=22h
h= 77/22
h= 7/2
h= 3.5m.