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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 cm2•

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 cm2•

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 60787 Points
3 years ago
. Inner diameter = 10.5 cm ::::::> Inner radius = 5.25 cm. SURFACE ARE/IS AND VOLUMES 1 93 Inner surface area = 2 >< 22 >< (5.25)2 cm2 = 173.25 cm2• 7 Cost of tin-plating = f (16 >< 1 : 5) = \' 27.72.

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