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Q: Walking 5/6 of its usual speed, a train is 10 minutes late. Find its usual time to cover the journey?

  • 1
    20 min
  • 2
    50 min
  • 3
    60 min
  • 4
    40 min
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Answer : 2. "50 min"
Explanation :

Let 6 speed cover in x minute time

So that 5 speed cover in (x-10) minute time

So we can say 

6x=5(x-10)

x=50 minute

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