## anonymous one year ago 2 cylinders are equal in volume. The radius of one is doubled, and the height of the other cylinder is increased to k times its original height. If 2 new cylinders are in equal in volume, what is the volume of k? I know the answer is 4 but I need help explaining it.

1. anonymous

You just did

2. anonymous

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3. anonymous

@Hero

4. IrishBoy123

$V_1 = \pi (2r)^2 h$ $V_2 = \pi (r)^2 \, h(k)$ set $$V_1 = V_2$$