the dome of a building is in the form of hemisphere. it's radius is 6.3m . find the cost of painting it at the rate of rs.12 per square. m
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CSA= 2πr^2
= 22/7×6.3×6.3
22+0.9×6.3×12=cost
= 22/7×6.3×6.3
22+0.9×6.3×12=cost
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