Question

an electric lamp in the form of a glass hemispherical base surmounted by a metallic cylindrical top of same radius 21 cm and height 3.5cm.the top was silver coated and the glass surface was painted red
1) what is the cost of silver coating the top at the rate of RS 5 per 100 cm²?​

Answer 1

Answer:

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Answer 2

Answer:

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