Question

the slant height and base diameter of a cone is 25m and 14m. find the cost of white washing it's curved surface area at rate of ₹210/100m²

Answer 1

Heya mate,Here is ur answer

L(slant height) =25 m

Base diameter= 14 m

Base radius =14/2

=7 cm


CSA of cone =πrl

$= \frac{22}{7} \times 7 \times 25$


$= 22 \times 25$


$= 550 \: m {}^{2}$

Cost of white washing 100 m^2 =₹210

Cost of white washing 1 m^2 =₹210 /100

=₹2.1

Cost of white washing 550m^2 =₹2.1 ×550

=₹1155

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@Laughterqueen

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