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.

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
Option B

Question: Raman buys an old scooter for Rs. 5000 and spends Rs. 1000 on its repairs. If he sells the scooter for Rs. 7200, his gain percent is :

 Option A: 20%

 Option B: 12%

 Option C: 10%

 Option D: 5%

 Option E: None of these
Option A

Question: The speeds of 3 trains in the ratio 4:12:24. The ratio between time taken by them to travel the same distance is?

 Option A: 6:2:1

 Option B: 1:2:3

 Option C: 4:8:9

 Option D: 6:5:2

 Option E: 4:8:7

Option A