3 years ago the average age of a family of 5 members was 17 years. After A baby born, the average age of the family is the same today. The present age of the baby is 

Solution of (x-2/x+2)2 +3 = (x-2/x+2); x ≠ -2 is

Find the missing term

MK : 169/121 : : JH : ?

The relation between velocity (V), frequency (n) and wavelength (λ) of a wave is given by

A hollow sphere in which a circus motorcyclist performs his stunts, has an inner radius of 7 m. Find the area available to the motorcyclist for riding. (Take Π= 22/7)

From a circular card sheet of radius 14 cm, two circles of radius 3.5 cm and a rectangle of length 3 cm and breadth 1 cm are removed. Two identical right triangles whose legs are of length 3 cm and 4 cm are joined. Then the area of the newly formed card is