List of top Mathematics Questions on Surface Area of a Right Circular Cone

In a polyhedron, the number of faces is 4 and the number of edges is 6, then the number of vertices of that polyhedron is:

The curved surface area of a right circular cone of height 12 cm and base diameter 10 cm is:

The total surface area of a cone with slant height 21 m and diameter of its base 24 m is

Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.

Find the total surface area of a cone, if its slant height is 21 m and diameter of its base is 24 m.

Curved surface area of a cone is 308 cm² and its slant height is 14 cm. Find. 
(i) radius of the base and 
(ii) total surface area of the cone.

A conical tent is 10 m high, and the radius of its base is 24 m. Find. 
(i) slant height of the tent. 
(ii) cost of the canvas required to make the tent, if the cost of 1 m2 canvas is 70.

What length of tarpaulin 3 m wide will be required to make conical tent of height 8 m and base radius 6 m? Assume that the extra length of material that will be required for stitching margins and wastage in cutting is approximately 20 cm (Use \(\pi\) = 3.14).

The slant height and base diameter of a conical tomb are 25 m and 14 m respectively. Find the cost of whitewashing its curved surface at the rate of ₹210 per 100 m².

A joker’s cap is in the form of a right circular cone of base radius 7 cm and height 24 cm. Find the area of the sheet required to make 10 such caps.

A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is Rs 12 per m², what will be the cost of painting all these cones? (Use \(\pi \) = 3.14 and take 1.04 = 1.02)