(B) Given:Diameter of the base $(d) = 24 \, m$Radius of the base $(r) = \frac{d}{2} = \frac{24}{2} = 12 \, m$Slant height $(l) = 21 \, m$The formula f

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(B) Given:Diameter of the base $(d) = 24 \, m$Radius of the base $(r) = \frac{d}{2} = \frac{24}{2} = 12 \, m$Slant height $(l) = 21 \, m$The formula for the total surface area of a cone is given by:Total Surface Area $= \pi r(r + l)$Substituting the values:Total Surface Area $= \frac{22}{7} \times 12 \times (12 + 21) \, m^2$$= \frac{22}{7} \times 12 \times 33 \, m^2$$= \frac{8712}{7} \, m^2$$\approx 1244.57 \, m^2$

Class 9 Mathematics Surface Areas and Volumes Textbook - Surface Areas and Volumes

Medium

Find the total surface area of a cone,if its slant height is $21 \, m$ and diameter of its base is $24 \, m$. (Take $\pi = \frac{22}{7}$) (in $, m^2$)

A
$5684.57$
B
$1244.57$
C
$1564.57$
D
$4455.57$

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Surface Areas and Volumes

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Textbook - Surface Areas and Volumes

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Find the total surface area of a cone,if its slant height is $21 \, m$ and diameter of its base is $24 \, m$. (Take $\pi = \frac{22}{7}$) (in $, m^2$)

Similar Questions

Curved surface area of a right circular cylinder is $4.4 \, m^2$. If the radius of the base of the cylinder is $0.7 \, m$,find its height. (Take $\pi = \frac{22}{7}$) (in $, m$)

The height of a cone is $16 \, cm$ and its base radius is $12 \, cm$. Find the curved surface area and the total surface area of the cone (Use $\pi = 3.14$). (in $, cm^2$)

The slant height and base diameter of a conical tomb are $25 \, m$ and $14 \, m$ respectively. Find the cost of white-washing its curved surface at the rate of $Rs. 210$ per $100 \, m^2$.

$A$ capsule of medicine is in the shape of a sphere of diameter $3.5 \, mm$. How much medicine (in $mm^3$) is needed to fill this capsule (in $, mm^3$)?

Find the surface area of a sphere of diameter $21 \, cm$. Assume $\pi = \frac{22}{7}$. (in $, cm^{2}$)

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