Two trains are each 50 m long moving parallel towards each other at speeds 10 m/ and 15 m/ respectively. After what time will they pass each other?
(a) 5√(2/3)sec
(b) 4sec
(c) 2 sec
(d) 6 sec
Correct option (b) 4 sec
Explanation:
Relative speed of each train with respect to each other be,
v = 10 + 15 = 25 m/*
Here distance covered by each train = sum of their lengths
= 50 + 50 = 100 m
∴ Required time = 100/25 = 4sec
