In the diagram above a cylinder is summounted b... - JAMB Mathematics 2002 Question
A
180 πcm3
B
162 πcm3
C
216 πcm3
D
198 πcm3
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Correct Option: D
Volume of cylinder = πr2h
= π x 32 x 20
= π x 9 x 20
= 180 πcm3
Volume of hemisphere = 2/3πr3
= 2/3 x π x 32
= 2 x π x 32
= 2 x π x 9
= 18π
= Volume of the solid = 180π x 18π
= 198πcm3
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