Question

The total length of all sides of a rectangular park is 72 metres.

If its length is 20 metres then its area is:​

Answer 1

Answer:

Let the breadth be x

Perimeter of the rectangular field - 2(L+B)

2(20+x)m

(40+2x)m

A.T.Q

(40+2x) = 72m

2x = 72-40

2x = 32

x = 32/2

x= 16m

Breadth = 16m

Area of the rectangular field = L× B

= 20×16m

= 320²m

Answer 2

Answer:

320

Step-by-step explanation:

if total length of rectangle=72

length=20

so breath=72-40 (total length=20+20=40)

=32/2

=16m

Area of rectangle= length× breath

=20×16

=320