What can be the maximum number of common tangent, which can be drawn to two non-intersecting circles? 

AB is diameter of a circle with centre 'O'. CD is a chord which is equal to the radius of the circle. AC and BD are extended so that they intersect each other at point P. Then find the value of ∠ APB.

PAB and PCD are two secants to a circle . If PA 10 cm , AB = 12 cm and PC = 11 cm , then what is the value ( in cm ) of PD ?

Which cities were India's first steel project-

If each side of a cube is increased by 10%. Then find the percent change in the volume of the cube.

The ratio between the number of sides of two regular polygons is 1 : 2 and the ratio between there interior angles is 2 : 3. The number of sides of these polygons is respectively 

A cube has sides that are 4 cm each, and the dimensions of a cuboid are 2cm x 3cm x 4cm. Find the positive difference between the volume of the cube and that of the cuboid.

The adjacent angles on a straight line are in the ratio 5 ∶ 4, then the smaller angle is –