Question

the area of four walls of a room is 150 sq. m. If the length of the room is twice its breadth and the height is 4 m. find the area of the floor.​

Answer 1

Step-by-step explanation:

2h(l+b) =150m²

Given that length=2× Breadth

let length be X,

=>2×4m(l+b)=150

=>l+b=150÷8

=>x+2x=150/8

=>3x=150/8

=>x=150/8×3=6.25

=>length=x=6.25

=>Breadth=2x=2×6.25=12.5

=>area=l×b=6.25×12.5

=78.125