Question
When the triangle is revolved about the side $BC$, then the base-radius, height and slant height of the produced cone becomes $AB, BC$ and $AC$ respectively. Therefore, the volume of the produced cone is
✓
Answer
Diameter of base of conical tent $= 14m$
Radius (r) $=\Big(\frac{14}{3}\Big)=7\text{cm}$
Height $(h) = 24 m$
$\therefore$ slant height (l) $=\sqrt{\text{r}^2+\text{h}^2}=\sqrt{7^2+24^2}$
$=\sqrt{49+576}=\sqrt{625}=25\text{m}$
$\therefore$ Surface area $=\pi\text{rl}=\frac{22}{7}\times7\times25\text{m}^2$
$= 550m^2$
Width of cloth used $= 5m$
$\therefore$ Length of cloth used $=\frac{550}{5}=110\text{m}$
Rate of cloth $= ₹ 25$ per metre
$\therefore$ Total cost $= ₹ 110 \times 25 = ₹ 2750$
Radius (r) $=\Big(\frac{14}{3}\Big)=7\text{cm}$
Height $(h) = 24 m$
$\therefore$ slant height (l) $=\sqrt{\text{r}^2+\text{h}^2}=\sqrt{7^2+24^2}$
$=\sqrt{49+576}=\sqrt{625}=25\text{m}$
$\therefore$ Surface area $=\pi\text{rl}=\frac{22}{7}\times7\times25\text{m}^2$
$= 550m^2$
Width of cloth used $= 5m$
$\therefore$ Length of cloth used $=\frac{550}{5}=110\text{m}$
Rate of cloth $= ₹ 25$ per metre
$\therefore$ Total cost $= ₹ 110 \times 25 = ₹ 2750$
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