The perimeter of a triangle is equal to perimeter of a rectangle. Length of rectangle is 75% of side of a square and ratio of length to breadth of rectangle is 3 : 2. If difference between perimeter of square and that of rectangle is 36 cm, then find perimeter of triangle?

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: 

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  );

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 diagonal of a rectangle is 17 cm long and its perimeter is 46 cm. Find the area of the rectangle.

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-