Q3 B of 13 Page 204

The base radii of two cylinders are in the ratio 2 : 3 and their height are in the ratio 5 : 4.

The volume of the first cylinder is 720 cubic centimetres. What is the volume of the second?


volume of first cylinder = 720cm3

now, as we know that, ratio of volumes of 2 cylinders is


and, =


so, we can also say that


=


⇒ V0 = × V1


= × V1


= × × V1


= (2 × × V1


= ()2× × 720


= × × 720


= 9× 144


= 1296cm3


∴ volume of the second cylinder is 1296cm3


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