Question

the area of the four walls of a room is 168 m square the breadth and the height of the room are the 10 M and 4 m respectively find the length of the room

Answer 1

Given that breadth of the room b = 10m.

Given that height of the room h = 4m.

We know that Area of the four walls = 2(l + b) * h.

Given that area of the four walls of the room = 168m^2.

2(l + b) * h = 168

2(l + 10) * 4 = 168

(l + 10) * 4 = 168/2

(l + 10) * 4 = 84

l + 10 = 84/4

l + 10 = 21

l = 21 - 10

l = 11.


Therefore the length of the room = 11m.


Hope this helps!

Answer 2

the length of room will be 11 m