Question

the height of a tent 9m . its base diameter is 24m . what is it slant height? find the cost of Canvas cloth required if its cost Rs 14 per square metre

Answer 1

Answer:

7920

Step-by-step explanation:

Given, height = 9 m.

Given, Diameter = 24m.

Then, radius = 12m.

We know that Slant height(l) = √h² + r²

= √9² + 12²

⇒ √81 + 144

⇒ √225

⇒ 15m.

We know that Curved surface area = πrl

= (22/7) * (12) * 15

= 3960/7

Cost of 1m² canvas = 14.

∴ Cost of 3960/7 m² canvas = (3960/7 * 14)

                                               = 7920.

Therefore, the cost of canvas required to make the tent = 7920.

Hope it helps!

Answer 2

Step-by-step explanation:

Diameter = 24 m

Radius = 12 m

Height = 9 m

Slant Height = l

So, l²= r²+h²

     l²= 12²+9²

     l²= 144+81

     l² = 225

     l = √225

     l = 15

C.S.A of Cone = πrl

                       =22/7×12×15

                       =565.71 m²

Cost of tent = Area×Cost of 1 m²

                  =565.71×14

                  = 7919.94 Rs