The dome of a building is in the form of a hemisphere. Its radius is 63dm. Find the cost of painting it at the rate of Rs. 2 per sq.m.

The dome of a building is in the form of a hemisphere. Its radius is 63m. Find the cost of painting it at the rate of Rs. 2 per sq.m.

One side of a square plot is 250m, find the cost of levelling it at the rate of Rs. 2 per square metre.

The area of a circular field is 2464 m^(2) . Find the cost of fencing it at the rate of Rs. 6.50 per metre .

The length and the breadth of a rectangular field are in the ratio 5:4 and its area is 3380 m^(2) . Find the cost of fencing it at the rate of Rs. 75 per m.

A wooden toy is in the form of a cone surmounted on a hemisphere. The diameter of the base of the cone is 5cm and its height is 4cm. Find the cost of painting the toy at the rate of Rs. 5 per 1000c m^2dot

A wooden toy is in the form of a cone surmounted on a hemisphere. The diameter of the base of the cone is 6cm and its height is 4cm. Find the cost of painting the toy at the rate of Rs. 5 per 1000cm

A wall is 11 m long and 4 m high. It has a door which is 2 m high and 1.5m wide. Find the cost of painting the wall at the rate of Rs 6 per sq. m.

The area of a circular playground is 22176 m^(2) . Find the cost of fencing this ground at the rate of Rs. 50 per m.

A dome of a building is in the form of a hemisphere. From inside, it was white-washed at the cost of Rs. 498.96. If the cost of white-washing is Rs. 2.00 per square metre, find the inside surface area of the dome and volume of the air inside the dome.

A dome of a building is in the form of a hemisphere. From inside, it was white-washed at the cost of Rs 498.96 . If the cost of white-washing is Rs 2.00 per square metre, find the (i) inside surface area of the dome, (ii) volume of the air inside the dome.