The length, width and height of a rectangular tank are 7 meters, 6 meters and 5 meters respectively, what will be the volume (cubic metre)  of this tank?

The radius of a circular field is equal to the side of a square field whose perimeter is 784 feet. What is the area o the circular field?

The radius of a circular wheel is 1.75 m. The number of revolutions it will make in travelling 11 km is (use  );

A took 15 sec. to cross a rectangular field diagonally walking at the rate of speed 52m / min and B took the same time to cross the same field along its sides walking at the rated speed 68 m / min. The area of the field is: 

if one of the interior angles of a regular polygon is $$15\over 16$$ times of one of the interior angles of a regular decagon, then the number of diagonal of the polygon is.

The ratio of the area of a square to that of the square drawn on its diagonal is :

A rectangular sheet of metal is 40 cm by 15 cm. Equal squares of side 4 cm. are cut off at the corners and  the remainder is folded up to form an open rectangular box. The volume of the box is-

The area of a square is 1764 cm² . The length of a rectangle is 4/7 of the side of the square and breadth of the rectangle is half its length. What is the perimeter of the rectangle?