Question
A circular cylinder and a hemisphere have the same
radius (r) and the height of the cylinder is equal to the diameter of the hemisphere. Find the ratio of their volumes.Solution
Volume of the cylinder = πr²h Volume of the hemisphere = 2/3 × πr³ (since the height of the cylinder is 2r, which is the diameter of the hemisphere) Ratio of the volumes = (πr²(2r)) / (2/3 × πr³) = 3/1 = 3:1.
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1 9 64 255 755 1835
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...18, 25, 33, 42, 52, 63, ?
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If  204    196       223   x  284
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...22Â Â Â 23Â Â Â Â 32Â Â Â Â 57Â Â Â 106Â Â Â ?
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620 632 608 644 596 ?
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