You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[EX Q]: Question: A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 66 km downstream?

Option A: 30/83 hours

Option B: 33/13 hours

Option C: 31/13 hours

Option D: 30/13 hours

Option E: 30/14 hours
[EX A]: Option B

[EX Q]: Question: A laborer is engaged for 30 days on the condition that he receives Rs.25 for each day he works and is fined Rs.7.50 for each day is absent. He gets Rs.425 in all. For how many days was he absent?

Option A: 22

Option B: 38

Option C: 19

Option D: 10

Option E: 28
[EX A]: Option D

[EX Q]: Question: A train 360 m long runs with a speed of 45 km/hr. What time will it take to pass a platform of 390 m long?

Option A: 38 sec

Option B: 35 sec

Option C: 44 sec

Option D: 40 sec

Option E: 60 sec
[EX A]:
Option E