Question

The length of a rectangle exceeds its breadth by 4 cm .if the length and breadth both are increased by 3cm,the area will be 81cmsquare more than that of the given rectangle find the length and breadth of the given rectangle.

Answer 1

breadth =4
let length = x+4
and both b&l is increased by 3cm
l=x+7
b=7
area =81 cm sq.
81=2(x+7+7)
81=2(x+14)
x+14=81/2
x+14=40.5
x=40.5-14
x=26.5 ans