External diameter of a hemispherical wooden pot is 10 cm and its thickness is 1 cm. Calculate the cost of colouring the pot at the rate of Rs 10 per square cm.

The diameter of a hemisphere iron-ball is 42 d cm . Calculate the cost of colouring the upper surface of it at the rate of ₹1.50 per square-meter.

The length of diameter of base of a hemispherical tomb is 42 dcm. Calculate the cost of colouring the upper surface of the tomb at the rate of ₹ 35 per square metre.

The internal and external diameters of a semicircular hollow sphere are 25 cm and 25 cm respectively. Calculate the cost of colouring the hemisphere at the rate ₹0.05 per square meter.

The external radius of a hollow hemisphere is 6 cm and it is of thickness 2 cm.What will be the whole surface area of the hemisphere?

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 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 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.

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 inner diameter of a circular well is 3.5 m. It is 10 m deep . Find (i) its inner curved surface area (ii) The cost of plastering this curved surface at the rate of Rs. 40 per m^(2)