After travelling 50km, a train is meeting with an accident and travels at 3/4th of the usual speed and reaches 45 min late. Had the accident happened 10km further on it would have reached 35 min late. Find the usual speed?

15km/hr

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20km/hr

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25km/hr

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30km/hr

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Solution

The correct option is B 20km/hr
Option B is the correct answer. Check the video for the approach.

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