Question

If the radius of a cylinder is doubled and the height is tripled, what happens to the volume?

A)
It is multiplied by 6.
B)
It is multiplied by 12.
It is multiplied by 18.
D)
It is multiplied by 32​

Answer 1

B

Explanation:

Original volume = pi * r^2 * h

New r = 2*r

New h = 3*h

New Volume = pi * (2r)^2 *3*h

New Volume = pi * 4r^2 * 3 *h

New Volume = 4*3 * pi * r^2 + h

Conclusion

The New Volume = 12* the original volume