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If the radius of the base and height of a cylinder and cone are each equal to `r` , and the radius of a hemisphere is also equal to `r` , then the volumes of the cone, cylinder and hemisphere are in the ratio (a) 1 : 2 : 3 (b) 1 : 3 : 2 (c) 2 : 1 : 3 (d) 3 : 2 : 1

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RS AGGARWAL-VOLUME AND SURFACE AREAS-All Questions
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