Two trains are coming from opposite directions with speed of 75 km/hr and 100 km

Question

Two trains are coming from opposite directions with speed of 75 km/hr and 100 km/hr on to parallel tracks. At some moment the distance between them is 100km. After T hours, distance between them is again 100 km. T is equal to?

Options:

A . 1 hr

B . $$1\frac{1}{7}$$ hr

C . $$1\frac{1}{2}$$ hr

D . 2 hr

Answer: Option B

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