if the radius of a cylinder is doubled and so is the height, what is the new volume of the cylinder divided by the old one? Choose the correct choice from the following.
A) 8 . B) 2 C) 6 D) 4 E) 10
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">pi * (2 ** 2) * 2</gadget>
<output>8*pi = around 25.132741</output>

<gadget id="calculator">pi * (1 ** 2) * 1</gadget>
<output>pi = around 3.141593</output>

<gadget id="calculator">(8*pi) / pi</gadget>
<output>8</output>

<result>A</result>
if the radius of a cylinder is doubled and so is the height, what is the new volume of the cylinder divided by the old one?
divide(volume_cylinder(multiply(const_1, const_2), multiply(const_1, const_2)), volume_cylinder(const_1, const_1))
let the radius be r and the the height be h . new radius = 2 r and height = 2 h . area ( new ) : area ( old ) = pi ∗ ( 2 r ) ^ 2 ∗ 2 h / pi ∗ r ^ 2 ∗ h = 8 : 1 . hence the answer is a .