Question

The length of a rectangle is 3 cm more than it's breadth of a rectangle .If the perimeter of a rectangle is 78 cm. Find its area

Answer 1

Let the breadth of the rectangle be xcm. Then according to question it's length will be x+3cm.

Also given that perimeter of the rectangle=78cm.
Therefore, 2(l+b)=78
2(x+3+x)= 78

2(2x+3)=78
4x+6=78
4x=78-6
x= 72/4
x= 18cm


Therefore,the breadth is x=18cm
and length=x+3= 18+3=21cm.

Area of rectangle= l×b=> 21cm×18cm
= 378cm².


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