alleryTwo trains run on parallel tracks at 60 km/h and 90 km/h in opposite directions. Their relative speed is
A30 km/h
B60 km/h
C90 km/h
D150 km/h
Answer & Solution
Correct answer: D. 150 km/h
In opposite directions, relative speed = sum of individual speeds = 60 + 90 = 150 km/h.
In the same direction, it would be the difference (30 km/h).
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