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Home Aptitude Time and Distance See What Others Are Saying!
  • Question
  • Mohan walking at a speed of 20 km/h reaches his office 1 h late. Next time he increases his speed by 5 km/h, then he reaches his office 30 min early. What is the distance of his office from his house?


  • Options
  • A. 100 km
  • B. 125 km
  • C. 150 km
  • D. None of the above

  • Correct Answer
  • 150 km 

    Explanation

    Distance of his office from his house = {ab/(b - a)} x (t1 + t2)
    Here, a = 20 km/h, t1 = 1 h, b = 20 + 5 = 25 km/h
    and t2 = 30 min = 0.5 h
    ? Distance = {20 x 25/(25 - 20)} x (1 + 0.5) = 500(1.5)/5
    = 100 x 1.5 = 150 km


  • More questions

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      ?. x 4 ? 227 = 398
      ?. y 2 + 321 = 346

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • Discuss
    • 2. If 6th March, 2005 is Monday, what was the day of the week on 6th March, 2004?

    • Options
    • A. Sunday
    • B. Saturday
    • C. Tuesday
    • D. Wednesday
    • Discuss
    • 3. 1, 4, 9, 16, 23, 25, 36

    • Options
    • A. 9
    • B. 23
    • C. 25
    • D. 36
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    • 4. 
      A sum of money is to be divided equally among P, Q and R in the respective ratio of 5 : 6 : 7 and another sum of money is to be divided between S and T equally. If S got ? 2100 less than P, then how much amount did Q receive?

    • Options
    • A. ? 2500
    • B. ? 2000
    • C. ? 1500
    • D. Couldn't be determined
    • Discuss
    • 5. 
      If a : b = b : c, then ratio a 4 : b 4 is equal to

    • Options
    • A. ac : b2
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    • Discuss
    • 6. 
      A man covers half of his journey at 6 km/h and the remaining half at 3 km/h. Find his average speed.

    • Options
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    • C. 4.5 km/h
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    • Discuss
    • 7. 
      A person can walk a certain distance and drive back in 6 h. He can also walk both ways in 10 h. How much time will he take to drive both ways?

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    • A. 2 h
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    • 8. 
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    • A. 10
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    • Options
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    • 10. 
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