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Home Aptitude Time and Distance Comments

  • Question
  • The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:


  • Options
  • A. 70 km/hr
  • B. 75 km/hr
  • C. 84 km/hr
  • D. 87.5 km/hr

  • Correct Answer
  • 87.5 km/hr 

    Explanation
    Let the speed of two trains be 7x and 8x km/hr.

    Then, 8x = 400 = 100
    4

    x = 100 = 12.5
    8

    ∴ Speed of first train = (7 x 12.5) km/hr = 87.5 km/hr.


    Time and Distance problems


    Search Results


    • 1. 3, 5, 7, 12, 17, 19

    • Options
    • A. 19
    • B. 17
    • C. 5
    • D. 12
    • Discuss
    • 2. 41, 43, 47, 53, 61, 71, 73, 81

    • Options
    • A. 61
    • B. 71
    • C. 73
    • D. 81
    • Discuss
    • 3. 835, 734, 642, 751, 853, 981, 532

    • Options
    • A. 751
    • B. 853
    • C. 981
    • D. 532
    • Discuss
    • 4. 331, 482, 551, 263, 383, 362, 284

    • Options
    • A. 263
    • B. 383
    • C. 331
    • D. 551
    • Discuss
    • 5. 16, 25, 36, 72, 144, 196, 225

    • Options
    • A. 36
    • B. 72
    • C. 196
    • D. 225
    • Discuss
    • 6. A man complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.

    • Options
    • A. 220 km
    • B. 224 km
    • C. 230 km
    • D. 234 km
    • Discuss
    • 7. If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:

    • Options
    • A. 50 km
    • B. 56 km
    • C. 70 km
    • D. 80 km
    • Discuss
    • 8. In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The duration of the flight is:

    • Options
    • A. 1 hour
    • B. 2 hours
    • C. 3 hours
    • D. 4 hours
    • Discuss
    • 9. A car travelling with 5⁄7 of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.

    • Options
    • A.
      17 6 km/hr
      7
    • B. 25 km/hr
    • C. 30 km/hr
    • D. 35 km/hr
    • Discuss
    • 10. A train can travel 50% faster than a car. Both start from point A at the same time and reach point B 75 kms away from A at the same time. On the way, however, the train lost about 12.5 minutes while stopping at the stations. The speed of the car is:

    • Options
    • A. 100 kmph
    • B. 110 kmph
    • C. 120 kmph
    • D. 130 kmph
    • Discuss


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