Area of a rectangle is 63
cm

^{2}. Find its perimeter if its width is 7cm.
Solution

First we find length

A = l x w

63 = l x 7

__63__=

__7l__

7 7

9 = l

Now length is 9cm.

We can find perimeter
since we have both length and width.

P = 2(l + w)

=2(9 + 7)

=2 x 16

=32

__Hence perimeter is 32cm__

__TRY THIS……………………..__
Area of a rectangle is 84
cm

^{2}. Find its perimeter if its width is 7cm.
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