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A train covers a distance of 20 km in 15 minutes. If its speed is increased by 10 km/hr, the time taken by it to cover the same distance will be:
  • a)
    13 minutes 20 seconds
  • b)
    12 minutes
  • c)
    11 minutes 10 seconds
  • d)
    10 minutes
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A train covers a distance of 20 km in 15 minutes. If its speed is incr...
Distance = 20km
Time = 15 minutes = 1/4 hr
∴ Speed of the train = 

After increasing its speed by 10 km/hr,
New speed = 90 km/hr
Distance = 20 km (given)


Thus, the time taken by the train will be 13 minutes and 20 seconds.
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A train covers a distance of 20 km in 15 minutes. If its speed is increased by 10 km/hr, the time taken by it to cover the same distance will be:a)13 minutes 20 secondsb)12 minutesc)11 minutes 10 secondsd)10 minutesCorrect answer is option 'A'. Can you explain this answer?
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