Question

Two cones have the same volume but different heights the taller cone is four times taller then the shorter cone your friend concludes that the radius of the shorter cone must be four times longer than the radius of the taller cone what is his error ?

Answer 1

the taller cone is four times taller then the shorter cone,
so it depends on value of their height not on radius
H =4h, where H is the height of the taller cone and h is the shorter's
the error is it is H =4h, not R=4r