Subject: mathqa
Question: two trains of equal length , running with the speeds of 60 and 16 kmph , take 50 seconds to cross each other while they are running in the same direction . what time will they take to cross each other if they are running in opposite directions ?
Option: 
A: 8.11
B: 13.15
C: 10.11
D: 77.2
Answer: B