A circle has a circumference of 48π centimeters. If the radius of the circle is multiplied by 9, what is the circumference of the new circle?

Question
Circles
asked 2021-02-21
A circle has a circumference of \(\displaystyle{48}π\) centimeters. If the radius of the circle is multiplied by 9, what is the circumference of the new circle?

Answers (1)

2021-02-22
Use the formula for the circumference of a circle: \(\displaystyle{C}={2}π{r}\)
Let r be the radius of the original circle so that: \(\displaystyle{2}π{r}={48}π\)
\(\displaystyle{r}={48}
0

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