TASK DEFINITION: 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.
PROBLEM: Question: A man performs 3/5 of the total journey by rail, 17/20 by bus and the remaining 6.5 km on foot. His total journey is :

 Option A: 125 km

 Option B: 130 km

 Option C: 135 km

 Option D: 140 km

 Option E: None

SOLUTION: Option B

PROBLEM: Question: A certain number of workers can do a work in 85 days. If there were 10 workers more it could be finished in 10 days less. How many workers are there?

 Option A: 75

 Option B: 30

 Option C: 28

 Option D: 24

 Option E: 32

SOLUTION: Option A

PROBLEM: Question: Ravi's salary was reduced by 25%. Percentage increase to be effected to bring salary to original level =

 Option A: 33.38 %

 Option B: 33.33 %

 Option C: 83.33 %

 Option D: 33.35 %

 Option E: 34.33 %

SOLUTION:
Option B