Question

The perimeter of a rectangular pool is 312 m.

If the width of the pool is 68 m, what is its length?
Length of the pool:
m

Answer 1

The perimeter of a rectangle is calculated by:

`\boxed{P=width +width+length+ length}`

Remember: In a rectangle, opposite sides are equals.

If we know how much is the width, then it's just apply it to the expression:

`P=width+width+length+length\\312 =68 + 68 + length + length\\312 = 136+(2\cdot length)\\312 - 136 = 2\cdot length\\2\cdot length = 176\\length = (176)/(2) \\length = 88`

Therefore, the length of the pool is 88m.