Answer: 1.8 m
Explanation:
The original height is taken as 100 % , since the height increased by 20 % , this means that the new height is 120% of the original height. That
120% of 1.5
which is
x 1.5
1.5 could be written as 15/ 10 in fraction , so we have
x

=
x

=

= 1.8
Therefore Arnav is 1.8m today