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 × 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 × 25 = ₹ 2750
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