A dome of a building is in the form of a hemisphere. From inside, it was white-washedat the cost of Rs 498.96. If the cost of white-washing is Rs 2.00 per square metre, findthe(i) inside surface area of the dome, (ii) volume of the air inside the dome.

Explanation

Cost of white wash(CSA)=Rs498.46

`1m^2=Rs2`

CSA of hemisphere=249.48`m^2`

`2pir^2=249.48`

`r^2=36.69`

`r=6.057m`

Volume of air inside=Volume of hemisphere

=`2/3pir^3`

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