Question

A round swimming pool has a circumference of 66 feet. Carlos wants to buy a rope to put across the diameter of the pool. The rope costs $0.45 per foot, and Carlos needs 4 feet more than the diameter of the pool. How much will Carlos pay for the rope? (Example 3)

Find the diameter.
C = πd
_____ ≈ 3.14 d
_____ /3.14 ≈ 3.14 d/3.14
_____ =d
Find the cost.
Carlos needs feet of rope. × $0.45 = Carlos will pay for the rope.

Answer 1

For the answer to the question above,
The circumference of a circle is the diameter times the pi. So, 66 ft = pi x d. 66 divided by pi is roughly 21, so the diameter is 21 ft. 21 + 4 = 25. 25 x $0.45 = $11.25
I hope my answer helped you.