Question

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 Square.

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Answer 1

Answer:

d=10.5cm

r=2d=210.5=5.25

Curved surface area of hemisphere=2πr2=2π(5.25)2=173.25cm2

Cost of tin plating 100cm2=16Rs

Cost of tin plating 1cm2=10016Rs

Cost of tin plating 173.25cm2=10016×173.25=27.72Rs

Cost of tin plating=27.72Rs

Answer 2

Answer: this is your answer