If radius of a sphere is decreased by 48%, then by what percent does its surface area decrease?

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 ?

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

Which cities were India's first steel project-

G is the centroid of a triangle ABC, and the median is AD, the ratio of AD and GA is

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

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.

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