Question

Solve C = 2πr (solve for "r")
C = 15

Answer 1

C = 2 pi r

but c = 15

15 = 2 pi r
15 = 2 * (22/7) * r
r = (15*7) / 2 / 22
r = 2.386

Answer 2

For this case we have the following equation:

`C = 2\pir`

From here, we clear the value of r:

`r = (C)/(2\pi)`

Substituting the values in the obtained equation we have:

`r = (15)/(2\pi)`

Doing the calculations we have:

`r = 2.4`

Answer:

The value of r is given by:

`r = 2.4`