Hi Neeraj,
Check Example 10 of Surface Area and Volumes here https://www.teachoo.com/1389/475/Example-10---A-hemispherical-dome-of-a-building-needs-to/category/Examples/
Written on Feb. 16, 2017, 10:19 p.m.
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A hemispherical dome of a building needs to be painted.if the circumference of the base The dome is 17.6m ,find the cost of painting it, at the rate of Rs 5per 100cm²
Davneet Singh
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