Mensurationhard · Past Paper
What happens to the volume of a cylinder if its radius is halved and its height is doubled?
AVolume remains same
BVolume is halved
CVolume is doubled
DVolume is quadrupled
✓ Correct Answer: B — Volume is halved
V' = π(r/2)^2 * (2h) = π(r^2/4) * 2h = (1/2)πr^2h. So it is halved.
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