Question

the area of the 4 walls of 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= 2h(l+b)=2h(7.5+3.5)=77m
=2h(11)=77
h=7÷2
h=3.5

Answer 2

"Hey mate here is your answer"

Area of four walls of room=77m square
Length of room=7.5m
Breadth of room=3.5m

Also, area of four walls of room=2(l+b)*h
77=2(7.5+3.5)*h
77=2h(11.0)*h
77=22*h
h=3.5m

ans(-Area of room is 3.5m.

Hope, it will help you.