The length of a rectangular swimming pool is twice as long as its width. If the perimeter of the pool is

Mathematics

1 answer:

Nitella [24]3 years ago

4 0

The perimeter of a rectangle is the sum of its sides, which are two widths and two lengths:

$p=w+w+l+l$

Since the length is twice the width, we have $l=2w$ , and the formula for the perimeter becomes

$p=w+w+2w+2w=6w$

So, we have

$6w=120 \iff w=\dfrac{120}{6}=20$

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