Speed, Time and Distance


  1. To cover a distance of 216 km in 3.2 hours, what should be the average speed of the car in metre/second?
    1. 67.5 metre/second
    2. 33.75 metre/second
    3. 37.5 metre/second
    4. 18.75 metre/second

  1. View Hint View Answer Discuss in Forum

    Required speed of car =
    Distance
    Time

    =
    216
    kmph.
    3.2

    =
    216
    ×
    5
    m./sec.
    3.218

    = 18.75 m./sec.

    Correct Option: D

    Required speed of car =
    Distance
    Time

    =
    216
    kmph.
    3.2

    =
    216
    ×
    5
    m./sec.
    3.218

    = 18.75 m./sec.


  1. At an average of 80 km/hr Shatabdi Express reaches Ranchi from Kolkata in 7 hrs. The
    distance between Kolkata and Ranchi is
    1. 560 km.
    2. 506 km.
    3. 560 m.
    4. 650 m.

  1. View Hint View Answer Discuss in Forum

    Distance = Speed × Time
    = (80 × 7) km.
    = 560 km.

    Correct Option: A

    Distance = Speed × Time
    = (80 × 7) km.
    = 560 km.



  1. A man travels 50 km at speed 25 km/h and next 40 km at 20 km/h and there after travels 90 km at 15 km/h. His average speed is :
    1. 18 kmph.
    2. 25 kmph.
    3. 20 kmph.
    4. 15 kmph.

  1. View Hint View Answer Discuss in Forum

    Total distance covered
    = (50 + 40 + 90) km
    = 180 km

    Time =
    Distance
    Speed

    ∴   Total time taken =
    50
    +
    40
    +
    90
    hours
    252015

    = (2 + 2 + 6) hours
    = 10 hours
    ∴  Average speed =
    Total distance
    Total time taken

    =
    180
    = 18 kmph
    10

    Correct Option: A

    Total distance covered
    = (50 + 40 + 90) km
    = 180 km

    Time =
    Distance
    Speed

    ∴   Total time taken =
    50
    +
    40
    +
    90
    hours
    252015

    = (2 + 2 + 6) hours
    = 10 hours
    ∴  Average speed =
    Total distance
    Total time taken

    =
    180
    = 18 kmph
    10


  1. Gautam goes to office at a speed of 12 kmph and returns home at 10 kmph. His average speed is :
    1. 11 kmph
    2. 22 kmph
    3. 10.9 kmph
    4. 12.5 kmph

  1. View Hint View Answer Discuss in Forum

    Here distances are same.

    ∴  Average speed =
    2xy
    kmph
    x + y

    =
    2 × 12 × 10
    kmph
    12 + 10

    =
    240
    kmph
    22

    = 10.9 kmph

    Correct Option: C

    Here distances are same.

    ∴  Average speed =
    2xy
    kmph
    x + y

    =
    2 × 12 × 10
    kmph
    12 + 10

    =
    240
    kmph
    22

    = 10.9 kmph



  1. A bus travels 150 km in 3 hours and then travels next 2 hours at 60 km/hr. Then the average speed of the bus will be
    1. 55 km/hr.
    2. 54 km/hr.
    3. 50 km/hr.
    4. 60 km/hr.

  1. View Hint View Answer Discuss in Forum

    Total distance covered by the bus = 150 km. + 2 × 60 km.
    = (150 + 120) km.
    = 270 km.

    ∴  Average speed =
    Total distance
    Time taken

    =
    270
    = 54 kmph.
    5

    Correct Option: B

    Total distance covered by the bus = 150 km. + 2 × 60 km.
    = (150 + 120) km.
    = 270 km.

    ∴  Average speed =
    Total distance
    Time taken

    =
    270
    = 54 kmph.
    5