Question 1174070
The volume of a cone varies jointly as its height and the square of the radius of its base. The radius of a cone is 4 cm when height is 6 cm and the volume is 32pi cm3. Find the volume of a cone whose radius is 4 cm and height is 8 cm.
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The volume of a cone varies jointly as its height and the square of the radius of its base. The radius of a cone is 4 cm when height is 6 cm and the volume is 32pi cm3. 
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This (above) is not needed.
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Volume of a cone:
{{{Vol = pi*r^2*h/3}}}