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With an average speed of 50 km/hr, a train reaches its destination in time. If it goes with an average speed of 40 km/hr, it is late by 24 minutes. The total journey is `30\ k m` b. `40\ k m\ ` c. `70\ k m` d. `80\ k m`

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With an average speed of 40 km/h, a train reaches its destination in time. If it goes with an average speed of 35 km/h, it is late by 15 minutes. The length of the total journey is:

A train when moves at an average speed of 40 kmph, reaches its destination. When its average speed becomes 35 kmph, then it reaches its destination 15 late. Find the distance of journey is:

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