<prompt> The height of a child is double the bih height at the age of-1 year2 years3 years4 years  <response>: Ans. is d i.e., 4 years o An infant usually doubles his bih height by the age of 412 years Age Bih 3 months 9 months 1 year 2 years 412 years Height 50 cm 60 cm 70 cm 75 cm 90 cm 100 cm 