Question

The perimeter of a rectangular pool is 348 m.

If the width of the pool is 78 m, what is its length?

Answer 1

The length of the rectangle is
`96 \text{m}`

Explanation:

The perimeter of a rectangle is calculated by
`P=2(l+w)` where
`l` represents the length and
`w` represents the width of the rectangle.

The perimeter of a rectangular pool is
`348 \text{m}`.

`P=2(l+w)\\348=2(l+78)\\348=2l+156\\2l=348-156\\2l=192\\l=(192)/(2)\\l=96 \text{m}`

Answer 2

Perimeter=add all sides
Rectangle=4 sides
Given: width of pool=78m
Given: perimeter is 348m
Other side parallel will also be 78m
Unknown: lengths (2)
78x2=156m
348-156m=192m
Unknown lengths should add up to 192m.
Unknown lengths should be the same length because parallel sides on a rectangle equal each other.
192/2=96m.
The length of the pool is 96m.