the ratio of the heights and radii of two cylinders are 1;2 and 2;1 respectively.then find out the ratio of their volumes?
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Answer: 2:1
let constant ratio of heights be 'a' & of their radii it be 'b'
V1 : V2 = π r1^2 h1 : π r2^2 h 2
V1 : V2 = r1^2 h1 : r2^2 h2
=(2b)^2× a : b^2×2a = 4 : 2 = 2 : 1
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