Question

The total area of four walls of a room is 660 m and the length is twice its width if the height of the room is 11 m then the area of its ceiling is

Answer 1

H=11m

L=20m

B=10m

A =20×10=200m^2

Answer 2

Surface area=2(l+b)h

Let length be x and therefore breadh is twice then b=2x

Height =11m

2*(x+2x)*11=660

22*3x=660

66x=660

x=10

Therfore L=10 and breadth =20

Then ceiling =l*b

10*20=200