Mathematics

Problem

The inside of a hemispherical dome of radius 7 m is to be plastered. Plastering charges are ₹90 per m

^{2}

for the first 100 m

^{2}

and ₹75 per m

^{2}

for the remaining area. What is the total cost of plastering? a) ₹25\,600 b) ₹24\,600 c) ₹24\,000 d) ₹26\,220