Question

A tent is in the shape of a right circular cylinder up to a height of 3 m and then becomes a right circular cone with a maximum height of 13.5 m above the ground. Calculate the cost of painting the inner side of the tent at the rate of Rs 2 per m², if the radius of the base is 14 m.

(A) Rs 2068

(B) Rs 2156

(C) Rs 2248

(D) Rs 1872

Answer 1

The correct option is: (A) Rs 2068

Explanation:

Radius of cylinder = Radius of cone = 14 m.

Height of cylinder = 3 m

Height of cone = 10.5 m

Slant height of cone 

Total curved surface area of tent = Curved surface area of cylinder + Curved surface area of cone 

Cost of painting the inner surface at the rate of Rs 2 per m² = 2 x 1034 = Rs 2068