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A solid toy is in the form of a hemisphere surmounted by a right circular cone. Height of the cone is 2 cm and the diameter of the base is 4 cm.

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A solid toy is in the form of a hemisphere surmounted by a right circular cone. Height of the cone is 2 cm and the diameter of the base is 4 cm. If a right circular cylinder circumscribes the toy, find how much more space it will cover.

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Given radius of cone, cylinder and hemisphere (r) = 4/2 = 2cm

Height of cone (l) = 2cm 

Height of cylinder (h) = 4cm

So remaining volume of cylinder when toy is inserted to it = 8π cm3

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