The radius and slant height of a cone are 10 | vedclass

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Question

(C) The total surface area of a cone is given by the formula: $TSA = \pi r(r + l)$,where $r$ is the radius and $l$ is the slant height.Given: $r = 10

Vedclass · Accepted Answer

$1100$

Vedclass · Answer

(C) The total surface area of a cone is given by the formula: $TSA = \pi r(r + l)$,where $r$ is the radius and $l$ is the slant height.Given: $r = 10 \, cm$,$l = 25 \, cm$.Using $\pi \approx \frac{22}{7}$ is not ideal here,let us check if $\pi \approx 3.14$ is intended or if the result is a multiple of $\pi$. Calculation: $TSA = \pi 	imes 10 	imes (10 + 25) = \pi 	imes 10 	imes 35 = 350\pi$.If we take $\pi \approx 3.14$,$TSA = 350 	imes 3.14 = 1099 \approx 1100 \, cm^2$.Thus,the correct option is $C$.

The radius and slant height of a cone are $10 \, cm$ and $25 \, cm$ respectively. Find the total surface area of a cone. (in $cm^2$)

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