Question

the area of rectangle reduced 20 m2 ,. if is length , increase by / m and the breadth reduced 2 m area increase by 12m2 if the length reduced 3 m and breadth increase 4 m find the dimansuon of rectangle​

Answer 1

=(L+1)(B-2)=LB-20

=LB-2L+B-2=LB-20

=B=2L-18 ---------------eq(1)

=(L-3)(B+4)=LB+12

=LB+4L-3B-12=LB+12

=4L-3B=24

=4L-3(2L-18)=24 ----------from eq(1)

=4L-6L+54=24

=-2L=24-54

=-2L=-30

=L=15m

In eq(1), B=2L-18

B=(2×15)-18

B=30-18

B=12 m

Thus, Length is 15m and Breadth is 12m.

Correct me if I'm wrong.