The parking fee of a certain car park is as follows:
If Pratik parks his car for 
then how much must he pay?
A₹ 4.00
B₹ 4.50
C₹ 4.75
D₹ 5.50
Ans 1:
Class : Class 8
first of all you should know the meaning of thereof it is
"if it is a part of something it should be taken as a whole"
to find the cost pratik have to pay for 3 and 1/2 hours is
first hour = 1.50
additional hour =1.00
1/2 hour is taken as a whole means one hour
so, additional hour = 3 * 1.00 = 3.00
to find the money he had to pay =
3.00+1.50
=4.50
so the answer is
B