Question

5. Find the total surface area of a cone, if its slant height is 9 m and the
diameter of its base is 12 m. (See fig.)
6. A conical tent is 10 m high and the radius of its base is 24 m. What is
its slant height? Find the cost of the canvas used, if one square metre​

Answer 1

Answer:

and 5-

l=9m

d=12m

therefore r=12/2 =6m

Surface area of cone = πrl

= 22/7 x 6 x 9

= 22/7 54

= 169.714 m²