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Two trains, one 152.5 m long and the other 157.5 m long, coming from opposite directions, crossed each other in 9.3 seconds. The combined speed of the two trains per hour is:
A130 km
B120 km
C125 km
D115 km
Answer & Solution
Correct answer: B. 120 km
1. Total distance covered = 152.5 + 157.5 = 310 m.
2. Combined speed = 310 / 9.3 = 33.33 m/s.
3. Convert: 33.33 x 3.6 = 120 km/h.
_Source: RRB Group D CEN-02/2018 PYQ, Q.8._