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Home Aptitude Time and Distance Comments

  • Question
  • A and B are 20 km apart. A can walk at an average speed of 4 km/hr and B at 6 km/h. If they start walking towards each other at 7:000 am, when they will meet?


  • Options
  • A. 8:00 am
  • B. 8:30 am
  • C. 9:00 am
  • D. 10:00 am

  • Correct Answer
  • 9:00 am 

    Explanation

    Suppose they will meet after T hours.
    Distance = Speed x Time
    Sum of distance traveled by them after T hours
    6T + 4T = 20 km
    T = 2 hours.
    So they will meet at 7:00 AM + 2 hours = 9:00 AM


  • Time and Distance problems


    Search Results


    • 1. 
      Pipe A fills the cistern in half an hour and pipe B in 40 minutes, but owing to a crack in the bottom of the cistern it is found that pipe A now takes, 40 minutes to fill the cistern. How long will B take now to fill it and how long will the crack take to empty it?

    • Options
    • A. The leak empties in 1 hour and B fills in 2 hours
    • B. B fills in an hour and the leak empties in 2 hours
    • C. B fills in an hour and the leak empties in an hour
    • D. Data inadequate
    • Discuss
    • 2. 
      A cistern can be filled by one of two pipes in 30 minutes and by the other in 36 minutes. Both pipes are opened together for a certain time but being particularly clogged only 5 / 6 of the full quantity of water flows through the former and only 9 / 10 through the later. The obstructions, however, being suddenly removed the cistern is filled in 15 1/ 2 minutes from that moment. How long was it before the full flow of water began?

    • Options
    • A. 1 minutes
    • B. 2 minutes
    • C. 21/2 minutes
    • D. 11/2 minutes
    • Discuss
    • 3. 
      Three taps A,B and C can fill a cistern in 10, 15 and 20 minutes respectively. They are all turned on at once, but after 3 minutes C is turned off. How many minutes longer will A and B take to fill the cistern?

    • Options
    • A. 2 min.
    • B. 2 min. 6 sec.
    • C. 1 min. 6 sec.
    • D. 3 min. 8 sec.
    • Discuss
    • 4. 
      Two pipes can fill a cistern in 14 and 16 h, respectively. The pipes are opened simultaneously and it is found that due to leakage in the bottom, it took 92 min more to fill the cistern. When the cistern is full, in what time will the leak empty it?

    • Options
    • A. 4319/23 h
    • B. 4317/23 h
    • C. 4313/23 h
    • D. 4319/23 h
    • Discuss
    • 5. 
      There are three taps of diameter 1 cm, 4/3 cm and 2 cm, respectively. The ratio of the water flowing through them is equal to the ratio of the square of their diameters. The biggest tap can fill the tank alone in 61 min. If all the taps are opened simultaneously, how long will the tank take to be filled?

    • Options
    • A. 44 min
    • B. 45 min
    • C. 155/18
    • D. None of the above
    • Discuss
    • 6. 
      Arjun runs a distance of 1500 m in 5 minutes. What is his speed in Km/hr?

    • Options
    • A. 16 km/hr
    • B. 18 km/hr
    • C. 15 km/hr
    • D. 20 km/hr
    • Discuss
    • 7. 
      In how many minutes will Rohit cover a distance of 800 m, if he runs at speed of 10 km/hr?

    • Options
    • A. 5 min 12 sec
    • B. 4 min 40 sec
    • C. 5 min
    • D. 4 min 48 sec
    • Discuss
    • 8. 
      A plane flies along the four sides of a square field at a speed of 200, 400, 600 and 800 km/hr. Then find the average speed of plane around the square field.

    • Options
    • A. 394
    • B. 400
    • C. 414
    • D. 384
    • Discuss
    • 9. 
      Laxman has to cover a distance of 6 km in 45 minutes . If he cover one half of the distance in 2/3 rd time . what should be his speed to cover the remaining distance in the remaining time?

    • Options
    • A. 12 km/hr.
    • B. 16 km/hr.
    • C. 3 km/hr.
    • D. 8 km/hr.
    • Discuss
    • 10. 
      A train cover a distance in 50 minutes, if it runs at a speed of 48 km per hour on an average. The speed at which the train must run to reduce the time of journey to 40 minutes?

    • Options
    • A. 50 km/hr.
    • B. 55 km/hr.
    • C. 60 km/hr.
    • D. 70 km/hr.
    • Discuss


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