4/5=0.8
since 4/5 is an inquelvient fraction it gets turned into a decimal
We have given
LM=4.12
MN=4
LN=5
OM=6.4
As <span>diagonals LN and OM intersect at point R.
so we divide LN by 2
we get 5/2=2.5
now using Pythagorean theorem
OR^2= 4^2-2.5^2
</span>OR^2=9.75
taking square root
OR=3.12
so the right answer is <span>d) 3.2</span>