A mansion has 12 right cylindrical pillars each having radius 50cm and height 3.5m. Find the cost to paint the lateral surface of the pillars at Rs.20 per square metre.

A cylindrical pilar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of Rs 12.50 per m^(2).

A cylinder has a base radius 80 cm and height 20 cm. Compare their lateral surface areas and total surface areas.

Find the cost of fencing a square park of side 250 m at the rate of ₹ 20 per metre.

A right circular cylinder has base radius 14 cm and height 21 cm. Find its area of base (or area of each end)

A tent is in the form of a right circular cylinder up to a height of 3 m and them becomes a right circular cone with a maximum height of 13.5 m above the ground. Calculate the cost of painting the inner surface of the tent at Rs 10/sq.m if the radius of the base is 14 m.

Find the volume of the right circular cone with radius 3.5 cm, height 12 cm.