Question

The slant height and base diameter of a conical tomb are 25 m and 14 m respectively. Find the cost of white washing it's curved surface at that rate of Rs 210 per 100 m square.
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Answer 1

Given :-

❄️Diameter = 14 m

❄️Radius = 7 m

❄️Height = 25 m

To find :-

• Curved surface area of the tomb &

Cost of white washing

According to the question,

Curved surface area of the tomb = $\sf{ \pi rl}$

$\implies \sf{ \frac{22}{7} \times 7 \times 25}$

$\implies \sf \red{ 550 \: {m}^{2} }$

.°. Cost of white washing at the rate of Rs 12

$\implies \sf{550 \times 12}$

$\implies \sf\red{Rs\:6600}$