Find the cost of painting 15 cylinderical pillars of a building at Rs. 2.50 per square metre if the diameter and height of each pillar are 48 cm and 7 metres respectively.

Find the cost of cultivating a rectangular field 80 m long and 35 m wide at Rs 15 per square metre. Also, find the cost of fencing the field at Rs 24 per metre.

Find the ost of painting 12 pillars each of dimeter 48 cm and height 7 m at the rate of Rs.2.50 per m^2 .

The cost of ploughing a square field at Rs 13.50 per square metre is Rs 5400. Find the cost of fencing the field at the rate of Rs 28.50 per metre

The total cost of flooring a room at Rs. 8.50 per square metre is Rs. 510. If the length of the room is 8 metres, find its breadth.

The total cost of flooring a room at Rs. 8.50 per square metre is Rs. 510. If the length of the room is 8 metres, find its breadth.

A tank with rectangular base and rectangular sides open at the top is to be constructed so that its depth is 3 m and volume is 75 m3. If building of tank costs Rs. 100 per square metre for the base and Rs. 50 per square metres for the sides, find the cost of least expensive tank.

A tank with rectangular base and rectangular sides open at the top is to be constructed so that its depth is 3 m and volume is 75 m3. If building of tank costs Rs. 100 per square metre for the base and Rs. 50 per square metres for the sides, find the cost of least expensive tank.

The cost of painting a solid sphere at the rate of 50 paise per square metre is Rs. 1232. Find the volume of steel required to make the sphere.