Mensurationmedium · Past Paper
A cylinder has a radius of 10 cm and height of 20 cm. If the height is doubled and radius is halved, the new CSA will be:
ADouble
BHalf
CSame
DFour times
✓ Correct Answer: C — Same
CSA = 2πrh. New CSA = 2π(r/2)(2h) = 2πrh. It remains the same.
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