Find the cost of polishing the circular table top of diameter 1.6m, if the rate of polishing is `15 m^2` (Take `pi=3.14`).

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

Find the surface area of a sphere of diameter : 3.5 m

Saima wants to put a lace one the edge of a circular table cover of diameter 1.5m. Find the elength of a lace required and also find its cost if one meter of the lace costs Rs15. (Take pi=3.14 ).

Find the cost od digging a cuboidal pit 8 m long, 6m broad and 3 m deep at the rate of Rs 30 per m^(3)

Find the cost of fencing a rectangular park of length 175 m and breadth 125 m at the rate of ₹ 12 per 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).

From a circular sheet of radius 4cm, a circle of radius 3cm is removed. Find the area of the remaining sheet. (Take pi=3.14 )

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.

A container opened from the top is in the form of a frustrum of a cone of height 16cm with radii of its lower and upper ends 8cm and 20cm respectively. find the cost of the milkwhich can completely fill the container at the rate of Rs. 20 per litre.[Take pie= 3.14 ]