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A right triangle ABC with sides 5 cm, 12 cm and 13 cm is revolved about the side 5 cm. Find the volume of the solid so obtained. If it is now revolved about the side 12 cm, then what would be the ratio of the volumes of the two solids obtained in two cases ? |
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Answer» Step-by-step explanation: Left hypotenuse=13cm Given TRIANGLE recolves around 12cm Radius =5cm Height =12cm Volume =1/3PIxr^2xH =1/3PIx5x5x12 Volume =100PI cm ^3 [nearly] CASE II (Second case) R= 2CM H= 5cm VOL. = 1/3xPIx12x12x5 Vol. =240PIcm^3 Therefore, the RATIO = 100/240 5:12 |
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