Question

The formula for the lateral surface area of a cylinder is S=2πrhS=2πrh , where r is the radius of the bases and h is the height.

Solve for r.



r=2hπ/S


r=S/2πh


r=h/2πS


r=2Sπh

Answer 1

Option b

Explanation:

S=2πrh

r=S/2πh

Answer 2

S / (2 * pi * h) = r

Explanation:

S = 2*pi * r * h

solve for r

Divide each side by 2* pi * h to isolate r

S / (2 * pi * h) = 2*pi * r * h/( 2 * pi * h)

S / (2 * pi * h) = r