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A cubical block of side 10 cm is surmounted by a hemisphere. What is the largest diameter that the hemisphere can have ? Find the cost of painting the

total surface area of the solid so formed, at the rate of < 5 per 100 sq. cm. [ Use  = 3.14 ]


The largest diameter of the hemisphere is equal to its edge which is 10 cm. total surface area of the solid is equal to the total surface area of the cube minus the base of the hemisphere plus the curved surface area of the hemisphere.
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