The inner CSA of a hemispherical dome of building is white washed. If circumference of base is 17.6 m , find the Total cost of white washing at the rate of 5Rs per m^2 .
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Answer:₹246.4
Step-by-step explanation:
Circumference of the base=2πr units
17.6=2πr
17.6/2×7/22=r
r=2.8m
C.S.A of hemisphere=2πr^2 sq.units
=2πr×r
=17.6×2.8
=49.28m^2
Cost of whitewashing per m^2=₹5
Cost of whitewashing the building=
5×49.28
=₹246.4
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