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  • Question
  • The respective ratio between the speeds of a car, a train and a bus is 5 : 9 : 4. The average speed of the car, the bus and the train is 72 Km/h together. What is the average speed of the car and the train together?


  • Options
  • A. 82 km/h
  • B. 78 km/h
  • C. 84 km/h
  • D. Cannot be determined

  • Correct Answer
  • 84 km/h 

    Explanation

    Total speed of car, bus and train = 72 × 3 = 216 Km
    Speed of car and train = ( 5 + 9 ) x 216 / ( 5 + 9 + 4 ) = 168 Km
    Average = 168 / 2 = 84 Km


  • Races and Games problems


    Search Results


    • 1. 
      In a game of 90 points, A can give B 15 points and C 30 points. How many points can B give C in a game of 100 points?

    • Options
    • A. 140
    • B. 20
    • C. 50
    • D. 30
    • Discuss
    • 2. 
      In a game of 100 points, A can give B 20 points and C 28 points. Number of points B can give C in a game of 100 points is:

    • Options
    • A. 10
    • B. 90
    • C. 15
    • D. 85
    • Discuss
    • 3. 
      A and B start from the same point and run around a circular stadium, whose circumference is 4200 m, at the rate of 500 m and 700 m per minute respectively, in the opposite directions. They will meet each other in :

    • Options
    • A. 3.5 minutes
    • B. 6.0 minutes
    • C. 8.4 minutes
    • D. 21 minutes
    • Discuss
    • 4. 
      A and B runs a Km race. If A gives B a start of 50 m, A wins by 14 sec and, if A gives B a start of 22 sec Km, B wins by 20 m. The time taken by A to run a Km is:

    • Options
    • A. 100 sec
    • B. 120 sec
    • C. 105 sec
    • D. 125 sec
    • Discuss
    • 5. 
      A and B run a 5 Km race on a round course of 400 m. If their speeds be in the ratio 5 : 4, then how often does the winner pass the other?

    • Options
    • A. 41?2 times
    • B. 31?2 times
    • C. 23?4 times
    • D. 21?2 times
    • Discuss
    • 6. 
      The ratio of father's age to the son's age is 4 : 1. The product of their ages is 196. the ratio of their ages after 5 years will be?

    • Options
    • A. 3 : 1
    • B. 10 : 3
    • C. 11 : 4
    • D. 14 : 5
    • Discuss
    • 7. 
      Mr. Sohanlal is 4 times as old as his son. Four years later the sum of their ages will be 43 years. The present age of son is?

    • Options
    • A. 5 years
    • B. 7 years
    • C. 8 years
    • D. 10 years
    • Discuss
    • 8. 
      The ratio of Vimal's age and Aruna's age is 3 : 5 and sum of their ages in 80 years. The ratio of their ages after 10 years will be?

    • Options
    • A. 2 : 3
    • B. 1 : 2
    • C. 3 : 2
    • D. 3 : 5
    • Discuss
    • 9. 
      Ratio of Ashok's age to Pradeep's age equal to 4 : 3. Ashok will be 26 years old after 6 years. How old is Pradeep now?

    • Options
    • A. 12 years
    • B. 15 years
    • C. 191/2 years
    • D. 21 years
    • Discuss
    • 10. 
      Sachin was twice as old as Ajay 10 years back. How old is Ajay today if Sachin will be 40 years old 10 years later?

    • Options
    • A. 20 years
    • B. 10 years
    • C. 30 years
    • D. 15 years
    • Discuss


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