Question

If a child's height is 2m, and it grows by 3 inch in 2 years. What is his height after 4 years from then?

Answer 1

height of boy is 2m
height of boy increases in one year=
$3 \div 2$
=1.25
height of boy after 4 years:
$4 \times 1.5 = 6.0m$