Question

The radius ofconical tent is 7cm and it's height is 10cm.Caluculate the length of canvas used in making the tent if the width of canvas is 2m...

Answer 1

HEYA!!!

Given,

Dimensions of cone are:

Radius = 7cm

Height = 10cm

then,

$l = \sqrt{ {r}^{2} + {h}^{2} }$

$l = \sqrt{ {7}^{2} + {10}^{2} }$

$l = \sqrt{49 + 100} \\ \\ l = \sqrt{149} \\ \\ l = 12.2cm$


CSA of cone =
$\pi r \:l$


$= \frac{22}{7} \times 7 \times 12.2$

= 268.4cm^2


TSA of cone =
$= \pi \: r \: \: (r + l) \\ \\ = \frac{22}{7} \times 7(7 + 12.2) \\ \\ = 22(19.2) \\ \\ = 422.4cm$


Area of rectangle = l×b

268.4 = l×2

l. = 268.4/2

l. = 134.2


Therefore, the length of canvas is 134.2 cm ..



HOPE THIS HELPS U @MP #MAHABOOBPASHA #☺☺