Question

A conical tent is 9m high and radius of its is 12m. What is the cost of the canvas required to make if Square metre cost rupees 10

Answer 1

Given,
Height of tent= 9 m
Base radius= 12 m
Cost per m²= ₹10/m²
Now,
Slant height= √[(9)²+(12)²]
√[81+144]
√225
15
Now,
Curved surface area=πrl
=22/7*12*15
=3960/7
=565.7
Now,
Total cost=565.7*10
₹5657

Hope this helps you!

Answer 2

Answer:

The cost of the canvas required to make conical tent is Rs.5657.14

 Step-by-step explanation:

Given the height of a conical tent, $h= 9m$

                 radius of a conical tent, $r= 12m$

Curved surface area of a cone is

                $C.S.A=\pi rl=\pi r\sqrt{r^{2} +h^{2} }$

                                     $=\frac{22}{7} \times 12 \times \sqrt{(12)^{2} +(9)^{2} }$

                                      $=\frac{22}{7} \times 12 \times \sqrt{(144 +81 }$

                                      $=\frac{22}{7} \times 12 \times \sqrt{(225 }$

                                      $=\frac{22}{7} \times 12 \times 15=565.714sq.m$

Given the rate of canvas = 10 Rs. per sq. m

Then the cost of the canvas to make conical tent is

                            $=565.714\times 10=5657.14Rs.$

Therefore, the cost of the canvas required to make conical tent is Rs.5657.14