Question

You ask an employee to string holiday lights around the perimeter of a circular room. The room is 30 feet in diameter. How many feet of lights will she need?

Answer 1

Answer: 94.24 feet.

Explanation:

1. To solve this exercise you must apply the formula for calculate the perimeter of a circle, which is shown below:

`P=2r\pi`

Where
`r` is the radius of the circle.

2. You can calculate the radius of the circle by dividing the diameter by 2, as following:

`r=(30ft)/(2)\\r=15ft`

3. Substitute this value into the formula. Then, you obtain that the result is:

`P=(2)(15ft)(\pi)\\P=94.24ft`