Speed, Time and Distance


  1. An athlete runs 200 metres race in 24 seconds. His speed (in km/hr) is :
    1. 20
    2. 24
    3. 28.5
    4. 30

  1. View Hint View Answer Discuss in Forum

    Speed =
    Distance
    Time

    =
    200
    m/s
    24

    200
    m/s =
    10
    ×
    18
    = 30 km/hr.
    24245

    ∵   x m/s =
    18
    x km/hr
    5

    Correct Option: D

    Speed =
    Distance
    Time

    =
    200
    m/s
    24

    200
    m/s =
    10
    ×
    18
    = 30 km/hr.
    24245

    ∵   x m/s =
    18
    x km/hr
    5


  1. A man crosses a road 250 metres wide in 75 seconds. His speed in km/hr is :
    1. 10
    2. 12
    3. 12.5
    4. 15

  1. View Hint View Answer Discuss in Forum

    Speed =
    Distance
    =
    250
    753

    =
    10
    m/sec =
    10
    ×
    18
    km/hr.
    335

    ∵   1 m/s =
    18
    km/hr
    5

    = 2 × 6 km/hr. = 12 km/hr.

    Correct Option: B

    Speed =
    Distance
    =
    250
    753

    =
    10
    m/sec =
    10
    ×
    18
    km/hr.
    335

    ∵   1 m/s =
    18
    km/hr
    5

    = 2 × 6 km/hr. = 12 km/hr.



  1. A man walking at the rate of 5 km/hr. crosses a bridge in 15 minutes. The length of the bridge (in metres) is :
    1. 600
    2. 750
    3. 1000
    4. 1250

  1. View Hint View Answer Discuss in Forum

    Speed of the man = 5km/hr

    = 5 ×
    1000
    m / min =
    250
    m / min
    603

    Time taken to cross the bridge
    = 15 minutes
    Length of the bridge
    = speed × time
    =
    250
    × 15m = 1250m
    3

    Correct Option: D

    Speed of the man = 5km/hr

    = 5 ×
    1000
    m / min =
    250
    m / min
    603

    Time taken to cross the bridge
    = 15 minutes
    Length of the bridge
    = speed × time
    =
    250
    × 15m = 1250m
    3


  1. An aeroplane covers a certain distance at a speed of 240 km hour in 5 hours. To cover the
    same distance in 1
    2
    hours, it must
    3
    travel at a speed of :
    1. 300 km./hr.
    2. 360 km./hr.
    3. 600 km./hr.
    4. 720 km./hr.

  1. View Hint View Answer Discuss in Forum

    Let the required speed is x km/hr

    Then, 240 × 5 =
    5
    × x
    3

    ∴  x = 720 km/hr.

    Correct Option: D

    Let the required speed is x km/hr

    Then, 240 × 5 =
    5
    × x
    3

    ∴  x = 720 km/hr.



  1. A train is travelling at the rate of 45km/hr. How many seconds it
    will take to cover a distance of
    4
    km ?
    5
    1. 36 sec.
    2. 64 sec.
    3. 90 sec.
    4. 120 sec.

  1. View Hint View Answer Discuss in Forum

    Time taken =
    Distance
    time

    =
    (4/5)
    hour
    45

    =
    4 × 60 × 60
    sec.
    5 × 45

    = 64 seconds

    Correct Option: B

    Time taken =
    Distance
    time

    =
    (4/5)
    hour
    45

    =
    4 × 60 × 60
    sec.
    5 × 45

    = 64 seconds