A round table cover has six equa designs as shown in Fig. 5.14. If the radius of the cover is 28 cm, find the cost of making the desingns at the rate of Rs 0.35 per `cm^(2).` `(" Use "pi=3.14).`

A round table cover has six designs of equal area as shown is the figure. If the radius of the cover is 28cm, find the cost of making the designs at the rate Rs. 0.35 per cm^2

A hemispherical bowl made of brass inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100cm^(2).

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

A solid wooden toy is in the form of a hemisphere surmounted by a cone of same radius. The radius of hemisphere is 3.5 cm and the total wood used in making of toy is 166(5)/(6)cm^(3) . Find the height of the toy. Also find the cost of painting the hemispherical part of the toy at the rate of Rs. 10 per cm^(2) (take pi=(22)/(7) )

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).

A rent is in the shape of a cylinder surmounted by a conical top. If the height and diameter of the cylindrical part are 2.1 m and 4m respectively , and the slant height of the top is 2.8m, 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. )

The bottom of a right cylindrical shaped vessel made from metallic sheet is closed by a cone shaped vessel as shown in the figure . The radius of the circular base of the cylinder and radius of the circular base of the cone each os equal to 7 cm . If the height of the cylinder is 20 cm and height of cone is 3 cm calculate the cost of milk to fill completely this vessel at the rate of Rs. 20 per litre.

A storage tank consists of a circular cylinder with a hemisphere stuck on either end. If the external diameter of the cylinder be 1.4 cm and its length be 8 m. Find the cost of painting it on the outside at rite of Rs. 20per m^2 .

Find the total surface area of a hemishphere for radius 10 cm. ("Use"pi=3.14)