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?

The area of a rhombus is 216 cm² and the length of its one diagonal is 24 cm . The perimeter ( in cm ) of the rhombus is 

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

A goat is tied with a 10.5 m-long rope to one corner of a plot which is in the shape of an equilateral triangle each side of which is 16 m long. Find the area that the goat can graze on.

The base of a triangle is 15 cm and height is 12 cm. The height of another triangle of double the area having the base 20 cm is

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

The circumference of a circle is 792 m. What will be its radius?

Three circles of radius 3.5 cm each are placed in such a way that each touches the other two. The area of the portion enclosed by the circles is