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.

Input: Consider Input: Question: A train 125m long takes 6 sec to cross a man walking at 5kmph in a direction opposite to that of the train. Find the speed of the train?

Option A: 65kmph

Option B: 70kmph

Option C: 75kmph

Option D: 80kmph

Option E: 85kmph

Output: Option B

Input: Consider Input: Question: The average age of 3 boys is 15 years and their ages are in the proportion 1:2:3. The age of the youngest boy is?

Option A: 10 years

Option B: 12 years

Option C: 15 years

Option D: 18 years

Option E: 7.5 years

Output: Option E

Input: Consider Input: Question: Ramu rides his bike at an average speed of 45 km/hr and reaches his desitination in four hours. Somu covers the same distance in six hours. If Ramu covered his journey at an average speed which was 9 km/hr less and Somu covered his journey at an average speed which was 10 km/hr more, then the difference in their times taken to reach the destination would be (in minutes)?

Option A: 11

Option B: 30

Option C: 88

Option D: 66

Option E: 41
Output: Option B