A well is drugged on a square field of side 4.2 m. Find the expenditure of fencing round the well at a rate of Rs. 10 per meter.

The area of a square piece of land is 6400 sq.m. Let's find the cost of fencing all around the land at Rs. 3.50 per meter.

The length of the base diameter of a wooden toy of conical shape is 10 cm. The expenditure for polishing whole surfaces of the toy at the rate of Rs. 2.10 perm² is Rs. 429. Calculate the height of the toy and also determine the quantity of wood which is required to make the toy.​

The base area of a right circular cone is 21m and height is 14m . Calculate the expenditure to colour the curved surface at the rate of rs. 1.50 per sq.m.

Both ends of right circular cylindrical tank are semicircular . If diameter of the tank be 1.4 metre and length be 5 metre , then what will be the expenditure of colouring the external surface of the tank at the rate of Rs 10 per square - metre ?

The length of the base diameter of a wooden toy of conical shape uis 10 cm . The expenditure for polishing whole surfaces of the toy at the raye of rupees 2.10 per square - metre is rupees 429. Calculate the height of the toy. Also determine the quantity of wood which is required to make the toy.

The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of Rs.10 perm² is Rs.15000, find the height of the hall.

The external diameter of a conical - coronet made off thermocol is 21 cm is length . To wrap up the outer surface of the coronet with foil , the expenditure will be rupees 57.75 at the rate of 10p per - m^2 . Calculate the height and slant height of the coronet

The external diameter of the base of a right circular cone - shaped wooden toy is 10 cm. The expenditure of colouring the total surface area on the outside of it at the rate of rs 0.07 per sq-cm is rs 19.80 Find the slant height of the toy.

The diameter of the base of a cylindrical pillar is 4 m and its height is 21 metres. Find the cost of constructing the pillar at Rs. 1(2)/(3) per cubic-metre.