Question

The kids are racing around a circle on the playground with a radius of 12 feet. If they ran around it 5 times, how far did they run round to the nearest foot?

Answer 1

377 feet

Explanation:

Find the circumference on the circle, using the formula C = 2
`\pi`r

Plug in 12 as r, the radius, then solve:

C = 2
`\pi`r

C = 2
`\pi`(12)

C = 24
`\pi`

Multiply this by 5, since the kids ran around it 5 times:

24
`\pi`(5)

= 120
`\pi`

To the nearest foot, this is 377.

So, the kids ran round 377 feet