Question

1. a solid cylinder has total surface area of 462 cm2 . If total surface area of the cylinder is thrice of its curved surface area. then the volume of the cylinder is:

Answer 1

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Answer 2

let radius of curved surface be r
πr^2h
3(πr^2)h=462
πr^2×3h=462÷3
r^2×3h=462÷3×22÷7
r×h=√441
r×h=21

volume of cylinder=πr^2h
22÷7×21×21