An oil drum is in the shape of a cyinder having the following dimensions : diameter is 2 m. and height is 7m. The painter charges Rs. 3 per `m^(2)` to paint the drum. Find the total charges to be paid to the painter for 20 drums.

An oil drum is in the shape of a cylinder having the following dimensions: diameter is 2 m. and height is 7 meters. The painter charges Rs. 3 per m^2 to paint the drum. Find the total charges to be paid to the painter for 10 drums?

An oil drum is in the shape of cylinder , whose diameter is 2m and height is 7m. The painter charges Rs 5 per m^2 to paint the drum. Find the total charges to be paid to the painter for 10 drums.

All oil drum is in the shape of a cylinder with two hemi-spheres stuck to each of its ends. The length of the drum is 5 m and the width is 1 m. Find its surface area.

Find (i) The total surface area of a closed cylindrical petrol storage tank whose diameter 4.2 m. and height 4.5 m.

Find the total surface area of a closed cylindrical petrol storage tank whose diameter 4.2 m and height 4.5 m.

tent is in the form of a cylinder surmounted by a cone having its diameter of the base equal to 24 m. The height of cylinder is 11 m and the vertex of the cone is 5m above the cylinder. Find the cost of making the tent, if the rate of canvas is Rs. 10 per m^(2)

Find the values of m for which the following equations have equal roots ? x^(2)+(m+3)x+m+6=0.

Find the values of m for which the following equations have equal roots ? i) x^(2)-15-m(2x-8)=0.

A one side open cylinderical drum has inner radius 28 cm, and height 2.1 m .How much water you can store in the drum . Express in litres .( 1 litre= 1000cc. )