Mensuration Practice Test 7

Radius of the conical tent = 7 m
Height = 24 m.
Slant height = l = $\sqrt{{\mathit{r}}^2+{\mathit{h}}^2}$
= $\sqrt{{\left(7\right)}^2+{\left(24\right)}^2}$
= $\sqrt{49+576}$ = $\sqrt{625}$
= 25 m

Curved surface area of the conical tent = πrl
= $\frac{22}{7}\times 7\times 25$
= 550 ${\mathit{m}}^2$
Cloth needed in meters = $\frac{550}{2.5}$ = 220 m