Question

The radius of a circle with an area of 60 square centimeters is represented by the expression StartRoot StartFraction 60 Over pi EndFraction centimeters. What is another way of expressing the radius?
2 StartRoot 15 pi EndRoot
4 StartRoot 5 pi EndRoot
StartFraction 2 StartRoot 15 pi EndRoot Over pi EndFraction
StartFraction 4 StartRoot 5 pi EndRoot Over pi EndFraction

Answer 1

sqrt(60/pi) = sqrt(60)/sqrt(pi) = sqrt(4·15)/sqrt(pi) = 2√15/√pi = (2√15·√pi)/pi = (2√(15π))/π.

So the correct choice is: (2√(15π))/π.