Question

The slant height and base diameter of a conical tomb are 25m and 14m respectively find the cost of White washing it's curved surface at the rate of rupees 210 per 100m²

Answer 1

Answer:

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Answer 2

Answer:

Slant height = 25m

Base radius = 7 m

CSA = πrl

$\\ \sf \implies \: \frac{22}{7} \times 7 \times 25 \\ \\ \\ \implies \sf \: 550 \: \: {m}^{2}$

Cost of white washing 100 m² area = Rs.210

Cost of white washing 550 m² :

$\\ \implies \sf \: \frac{210 \times 550}{100} \\ \\ \\ \implies \sf \: rs.115$