Question

The area of 4 walls of a room is 210 meter square . If the length of the room is twice its breadth and the walls are 5 meter high , find the area of the floor

Answer 1

let l be length and b be breadth

l=2b

2b*5*4=210

b=21/4

area of floor =l*b=21/2*21/4=441/8