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A train leaves a station and travels north at 50​km/hr. FourFour hours​ later, a second train leaves on a parallel track and travels north at 90​km/hr. How far from the station will they​ meet?
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A train leaves a station and travels north at 50​km/hr. FourFour hours​ later, a second train leaves on a parallel track and travels north at 90​km/hr. How far from the station will they​ meet?

User Maulik Savaliya
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1 Answer

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Four hours later means the second train must catch up 50*4=200 km.
The difference in speed is (90-50)=40 km/hour.
Time to catch up = 200 km/40 km/hour = 5 hours.
User Kristal
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