Class : Class 5
I hope that you have studied in 4th standard, but it is said that if the shaded area is more or equal than half, then we count that block as a normal/whole block. That is why there are 14 squares.
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Ans 2:
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