Question

the slant height and base diameter of a conical tomb are 25m and 14m respectively.find the cost of white washing its curved surface at the rate of ₹210 per 100 m².​

Answer 1

Answer:

$r = 25 \div 2 \\ = 12.5 \\ l = 14 \\ csa = \pi \: rl \\ = 22 \div 7 \times 12.5 \times 14 \\ = 550 \\ cost \: of \: white \: washing \: \: = 210 \div 100 \times 550 \\ = 1155$