well well...

I cannot say how GLAD i'm by hearing that ukorov is wrong!!! (sorry ukorov)

yes as pflo says the radius decreases as the height decreases. and we were tought the formula that if length ratio is x:y volume ratio is x^3:y^3

honestly 93.6% sounds a bit too much.

bad news - the exam i spoke of was the VCE exam (the end of year exam for year 12 in Victoria, Australia). So it would take days to get a correct answer.

can anyone else confirm my answer?