Question

The height of attention is 9 cm it's base diameter is 24 cm what is it's slant height? Find the cost of canvas required if it costs RS 14 per sq.m.

Answer 1

Answer:

Rs. 7920

Step-by-step explanation:

Height = 9 cm.

Base diameter = 24 cm

Radius = 12 cm.

Let L be the slant height.

L² = r² + h²

   = (12) ² + (9)² = 225.

=> L = √225 = 15 cm.

So the slant height is 15 cm.

Curved surface area of cone = πrL

                                                = π * 12 * 15 = 565.71 m².

cost of tent = Area * Cost/m²

                   = π * 12 * 15 * 14 = Rs. 7920.