Question

A dome of the building in the form of hemisphere from inside it was a white wash of the cost of rupees a 49 8.96 if the cost of whitewashing is 2.00 per metre square find the inside surface area of the volume of the air inside the dome
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Answer 1

Answer:

CSA of Hemisphere =498.96/2

=249.48m2

Inside Surface Area2 πr 2 =498.96

r^2 =498.96 / 2π

r^2 =498.96x7 /2 x 22=79.38

r =v79.38

= 8.9m

vol.of air inside 2/3πr 3

2/3x22x8.9x8.9x8.9=1477m3

INSIDE surface area=249.48m2

Vol. of air inside = 1477m3