Question

The area of a rectangle is 100 cm square and its lenght is 25 cm. Find its width and perimeter.

Answer 1

A
$= 100cm ^{2}$
A = l x b
We know that,
l = 25cm
b = A/l
=>b = 100/25 = 4cm.

Perimeter = 2(l+b)
= 2(25 + 4)
= 2 x 29
= 58cm.



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Answer 2

The area is 100 cm^2

We know area = length * breadth

==> length is 25 cm

So 25 cm * b =100 cm^2

==> b = 100 cm ^ 2 / 25 cm

==> b = 4 cm

Perimeter = 2 ( l + b )

==> 2 ( 25 cm + 4 cm )

==> 2 * 29 cm

==> 58 cm

The breadth is 4 cm and perimeter is 58 cm

Hope it helps you

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