Two trains are each 50m long moving parallel towards each other at speeds 10 m/s and 15 m/s respectively, at what time will they pass each other

Question

Two trains are each 50m long moving parallel towards each other at speeds 10 m/s and 15 m/s respectively, at what time will they pass each other (A) 8 s (B) 4 s (C) 2 s (D) 6 s

Tardigrade Admin · Accepted Answer

As both the trains are moving in the opposite direction, the relative speed of each train with respect to each other be,

v = 10 + 15 = 25 m / s

Here distance covered by each train

=

sum of their lengths

= 50 + 50 = 100 m

∴

Required time

= \frac{100}{25} = 4 sec

Q. Two trains are each 50m long moving parallel towards each other at speeds 10 m/s and 15 m/s respectively, at what time will they pass each other

8 s

4 s

2 s

6 s

As both the trains are moving in the opposite direction, the relative speed of each train with respect to each other be, v=10+15=25m/s Here distance covered by each train = sum of their lengths =50+50=100m ∴ Required time =25100​=4sec

As both the trains are moving in the opposite direction, the relative speed of each train with respect to each other be, $v = 10 + 15 = 25 m / s$

Here distance covered by each train $=$ sum of their lengths $= 50 + 50 = 100 m$
$∴$ Required time $= \frac{100}{25} = 4 sec$