Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
--------
Question: Problem: a train 50 m long takes 6 sec to cross a man walking at 5 kmph in a direction opposite to that of the train. find the speed of the train ?
Options: a. 15 kmph, b. 25 kmph, c. 35 kmph, d. 45 kmph, e. 55 kmph

Answer: b

Question: Problem: sakshi can do a piece of work in 5 days. tanya is 25 % more efficient than sakshi. the number of days taken by tanya to do the same piece of work :
Options: a. 4, b. 16, c. 18, d. 25, e. 10

Answer: a

Question: Problem: a rectangular photograph is surrounded by a border that is 3 inch wide on each side. the total area of the photograph and the border is m square inches. if the border had been 6 inches wide on each side, the total area would have been ( m + 178 ) square inches. what is the perimeter of the photograph, in inches ?
Options: a. 34, b. 36, c. 38, d. 40, e. 20

Answer:
e