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If a train runs at $40$ kmph, it reaches its destination late by $11$ minutes but if it runs at $50$ kmph, it is late by $5$ minutes only. The correct time for the train to complete its journey is:

1. $13$ min
2. $15$ min
3. $19$ min
4. $21$ min

Both are same then 40/60(x+11)​=50/60(x+5)​

40x+440=50x+250

10x=−190

x=19 minutes

164 points

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