The length of a rectangle is 5/4of its breadth If the perimeter is 81m Find its area - Maths - Mensuration

Question

The length of a rectangle is 5/4of its breadth If the perimeter is
81m Find its area

Neha Sethi · Accepted Answer

Dear student
Let breadth of the rectangle= b mSo, length of rectangle,l=54×b=5b4  
1Given : perimeter of rectangle,P=81 mWe know that Perimeter of rectangle=2l+b81=25b4+b⇒40
5=9b4⇒162=9b⇒b=18 mSo, l=54×18   using 1=22
5  mArea of rectangle= l×b=22
5×18=405 m2
Regards

The length of a rectangle is 5/4of its breadth. If the perimeter is 81m. Find its area.