The diameter of a roller is 84 cm and its length is 120 cm. It takes 500 complete revolutions to roll once over the play ground to level. Find the area Of the play ground in `m^2`

The area of rectangle is 160cm^2 and its length is 16cm then find perimeter.

The curved surface area of a cone is 5170 cm^2 and its diameter is 84 cm. What is its slant height?

Fill in the blanks - Area of rectangle is 240cm^2 . Its length is 20 cm. Find its bredth.

A cylinderical pencil is sharpened to produce a perfect cone at one end with no over all loss of its length. The diameter of the pencil is 1 cm and the length of the conical portion is 2 cm. Calculate the volume of the shavings. Give your answer correct to two places if it is in decimal. ["Use "pi=355/113]

The area of an equilateral triangle is 49sqrt3 cm^2 . Taking each angular point as centre, a circle is described with radius equal to half the length of the side of the triangle as shown in the figure. Find the area of the portion in. the triangle not included in the circles.

A cylindrical pillar has a diameter of 56 cm and is of 35 m high. There are 16 pillars around the building. Find the cost of painting the curved surface area of all the pillars at the rate of ₹5.50 per 1 m^2

When a steel rod of length 2m is compressed its length decreases by 0.1cm. Find the work done per unit volume against the compressive stress.