Question

When length and breadth of a rectangle increased by 2cm, area of the rectangle increased by 72cm2. Find the parameter of the rectangle?

Answer 1

Answer: 68 cm

Step-by-step explanation:

Let length be l and breadth be b.

Area = lb

Now, (l+2)(b+2) = lb + 72

=> lb+ 2l +2b + 4 = lb +72

=> 2(l+b) = 68

=> Perimeter = 68

Answer 2

l×b=x

when increased,

(l+2)(b+2)=72+x

lb+2b+2l+4=72+x

x+2b+2l=68+x

2(b+l)=68

perimeter=68cm.