Question

The ratio of the length and breadth of rectangle is 4:5. If the perimeter of rectangle is 144 cm. Find
its area.​

Answer 1

Explanation:

Let the length of the rectangle be 4x and breadth be 5x

A.T.Q.

2(l+b)=144cm

2(4x+5x)=144cm

2(9x)=144

18x=144cm

x=144/18

x=8cm

Putting the value of x in 4x and 5x

Length =32cm

Breadth=40cm

Area of rectangle=l×b

=32×40

=1280cm^2

Hence; the area is 1280 cm square.