Question

the length of a rectangle is 7m more than its breadth if the length is decrese by 10m and breadth is decreased by3m,then the area is decreased by 108m find the length and breadth of rectangle

Answer 1

L=b+7
Therfore area=b(b+7)
=b²+7b

New l=b-3
And new b=b-3
Area=(b-3)(b-3)=b²-6b+9

Then new area=lb-108

Now
B²+6b+9=b²+7b-108
7b-6b=108+9
B=117

And L=B+7=117+7=124

Answer 2

the answer is 124.....