Question

the area of rectangle remain unaltered when its breadth is reduced by 3 metre .the perimeter of rectangle is 36 metre .the area of the rectangle is

80 sq metres 77 square metre 72 square metre 65 square metre ​

Answer 1

Area of a rectangle is, =l

lx(b-3)=lb.... (1)

lb-3l=lb

p=2(l+b)=36

=2(l+b-3)=36

l+b-3=18

l+b=21....... (2)

From.... (1) and (2)

l=0

b=21

A=0