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Question

A solid consisting of right circular cylinder with a hemisphere of one end and a cone and the other. Their common radius is 7 cm. The height of cylinder and cone are each of 4 cm. Find the volume of the solid.

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Solution

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Given,
height of cylinder = height of cone = 4cm
radius of all = 7cm
To find : volume of the figure
Th collective volume = volume of hemisphere + volume of cylinder + volume of cone
volume=(2/3πr3+πr2h+13πr2h)unit3
=2/3π(73)+π(72)4+13π(72)4cm3
=49π(14/3+4+4/3)cm3=49π(14+12+43)
=490πcm3
=490×22/7cm3=1540cm3

1371018_1227341_ans_b88960044ccf4a0fba47b86979b49e62.JPG

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