Question

The perimeter of rectangle is 72 cm and its length is 20 cm. then what is the area of it??​

Answer 1

Answer:

perimeter of rectangle :- 2( length + breadth)

: $\implies$ 72 = 2( 20 + x )

: $\implies$ 72 = 40 + 2x

: $\implies$ 2x = 72 - 40

: $\implies$ 2x = 32 cm.

: $\implies$ x = $\dfrac{32}{2}$

: $\implies$ x = $\boxed{\sf{16 cm }}$

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Area of rectangle = length× breadth

: $\implies$ = 20 × 16

: $\implies$ = $\boxed{\sf{320 sq.cm}}$

Therefore, The area of Rectangle is 320 sq.cm