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A hemispherical bowl made of brass has i...

A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per`100 cm^2`.

Text Solution

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Curved surface area=`2pir^2`
=`2*22/7*(10.5/2)^2`
=`173.25cm^2`
Total cost=curved surface area *cost
=173.25*0.16
=27.72 Rs.
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