A NCC camp for a weak was organised for Class IX students. The accomodation was planned in hemispherical tents each of radius 2.8 cm. obtain the area of the canvase required for making the tent. Also, find the cost of tent `Rs. 300 per m^2`. In what way camping is helpful for the development of the students?

A conical tent is 10 m high and the radius of its base is 24 m. Find cost of the canvas required to make the tent, if the cost of 1 m^2 canvas is Rs 70.

A tent is in the shape of a cylinder surmounted by a conical top.If the height and diameter of the cylindrical part are 2.1m and 4 m respectively, and the slant height of the top is 2.8 m, find the area of the canvas used for making the tent. Also, find the cost of the canvas of the tent at the rate of Rs 500 per m^2 (Note that the base of the tent will not be covered with canvas.)

A conical tent is 10 m high and the radius of its base is 24 m. What is its slant height ? Find the cost of the canvas used, if one m^2 of canvas costs Rs 14.

A joker’s cap is in the form of a right circular cone of base radius 7 cm and height 24 cm. Find the area of the sheet required to make 100 such caps if 1m^2 of sheet used for making cap costs Rs 700.

A conical tent is 10 m high and the radius of its base is 24 m. Find (i) slant height of the tent. (ii) cost of the canvas required to make the tent, if the cost of 1 m^2 canvas is ₹ 70. Assume pi = 22/7 , unless stated otherwise.

In a building there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. Find the total cost of painting the curved surface area of all pillars at the rate of Rs 8 per m^2 .