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Home Aptitude Problems on Trains See What Others Are Saying!
  • Question
  • A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?


  • Options
  • A. 69.5 km/hr
  • B. 70 km/hr
  • C. 79 km/hr
  • D. 79.2 km/hr

  • Correct Answer
  • 79.2 km/hr 

    Explanation
    Let the length of the train be x metres and its speed by y m/sec.

    Then, x = 8     ⟹     x = 8y
    y

    Now, x + 264 = y
    20

    ⟹ 8y + 264 = 20y

    y = 22.

    ∴ Speed = 22 m/sec = 22 x 18 km/hr = 79.2 km/hr.
    5

  • More questions

    • 1. 
      A certain sum amounts to Rs 1586 in 2 year and Rs 1729 in 3 year. Find the rate and the sum.

    • Options
    • A. 8 %
    • B. 9 %
    • C. 10 %
    • D. 11 %
    • Discuss
    • 2. 
      (21 + 99) x (30 - 19.02) =?

    • Options
    • A. 3581
    • B. 131
    • C. 1290
    • D. None of these
    • Discuss
    • 3. 
      In a game A can give B 25 points in 75 and C 18 points in 90. How many points can C give B in a game of 120?

    • Options
    • A. 20
    • B. 30
    • C. 40
    • D. 50
    • Discuss
    • 4. 
      The average of 6 number 13, 17, 25, 11, 26, 10 is

    • Options
    • A. 20
    • B. 17
    • C. 15
    • D. 25
    • Discuss
    • 5. 
      A cistern has a leak which would empty it in 15 hours. A tap is turned on which admits 2 litres per hour into the cistern and it is now emptied in 10 hours. How many litres does the cistern hold?

    • Options
    • A. 50 litres
    • B. 60 litres
    • C. 45 litres
    • D. 360 litres
    • Discuss
    • 6. 
      Average of a,b and c is 11, average of c,d and e is 17 average of e and f is 22 and the average of e and c is 17 . Find out the average of a, b, c, d, e and f.

    • Options
    • A. 151?3
    • B. 162?3
    • C. 171?2
    • D. 152?3
    • Discuss
    • 7. 
      A man buys 3 cows and 18 goats in ? 47,200. Instead if he would have bought 8 cows and 3 goats, he had to pay ? 53,000 more. Cost of one cow is:

    • Options
    • A. ? 10,000
    • B. ? 11,000
    • C. ? 12,000
    • D. ? 13,000
    • Discuss
    • 8. Six years ago, the ratio of the ages of Kunal and Sagar was 6 : 5. Four years hence, the ratio of their ages will be 11 : 10. What is Sagar's age at present?

    • Options
    • A. 16 years
    • B. 18 years
    • C. 20 years
    • D. Cannot be determined
    • E. None of these
    • Discuss
    • 9. 
      (17.28 ÷? ) / (3.6 x 0.2) = 2

    • Options
    • A. 120
    • B. 1.20
    • C. 12
    • D. 0.12
    • Discuss
    • 10. 
      If a, b and c are non-zero, a + (1/b) = 1 and b + (1/c) = 1, then the value of abc is

    • Options
    • A. -3
    • B. 1
    • C. -1
    • D. 3
    • Discuss


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