A wall is the form of a trapezium with height 8 m and parallel sides being 5 m and 10 m. What is the cost of painting the wall, if the rate of painting is Rs. 50 per square meter  ?

A field roller, in the shape of a cylinder, has a diameter of 1 meter and length of $$ {1}{1\over4}$$ meter. If the speed at which the roller rolls is 14 revolutions per minute, then the maximum area ( in m²) that it can roll in 1 hour is:

The ratio of the areas of two circles is 16: 25. What will be the ratio of their circumferences?

A solid cube, whose diagonal is $$ 128 {\ sqrt {2}} \ cm $$, is molded to form a cuboid. The length and width of the cuboid are 512 cm and 160 cm, respectively. What is the height of the cuboid?

If a chord of length 30 cm is at a distance of 8 cm from the center of the circle, then the length of the chord of the same circle which is at a distance of 15 cm from the center is equal to

In the given figure if each of the outer circles have radii ‘R’, then the radius of the inner circle will be:

Find the area of a white sheet required to prepare a cone with a height of 21cm and the radius of 20cm.

The length of the diagonal of a square is 'a' cm. Which of the following represents the area of the square (in sq. cm)?