The perimeter of a floor of a room is 30 m and its height is 3 m. Find the area of four walls of the room.
Given,
Perimeter of floor = 30 m
Height of floor = 3 m
So,
= 
= 
Area of four walls of room = 
12
The perimeter of a floor of a room is 30 m and its height is 3 m. Find the area of four walls of the room.
Given,
Perimeter of floor = 30 m
Height of floor = 3 m
So,
=
=
Area of four walls of room =