the dome of a building is in the form of a hemisphere . its radius is 63 dm . find the cost of painting it at the rate of Rs 2 per square metre?
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Answer:
Rs. 74844
Step-by-step explanation:
Radius , r = 63 dm
ie. , r = 6.3 m
CSA OF HEMISPHERE = 3πr^2
= 3 x 22/7 x 63 x 63
= 66 x 567
= 37422 metre square
Cost of painting it at the rate of
Rs 2 per 38082 metre square = 37422 x 2
= Rs 74844
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