Speed, Time and Distance


  1. If a man takes 4 hours to cover a distance of 15 km. how much time will be needed to cover 63 km. at the same speed ?
    1. 12 hrs. 36 min.
    2. 16 hrs. 48 min.
    3. 16 hrs. 4 min.
    4. 15 hrs. 32 min.

  1. View Hint View Answer Discuss in Forum

    Required time = (4 / 15) x 63 hrs.

    Correct Option: B

    Required time = (4 / 15) x 63 hrs.
    = 16 hrs. 48 min


  1. A train is moving with a speed of 92.4 km/hr. how many meters will it cover in 10 min. ?
    1. 1540
    2. 15400
    3. 154
    4. 15.4

  1. View Hint View Answer Discuss in Forum

    Speed in m/sec = ( 5 / 18 ) x Speed in kms/hr.
    92.4 kms/hr = 92.4 x (5 / 18) m/sec.
    ∴ Req. distance = 92.4 x ( 5 / 18 ) x 600 meters

    Correct Option: B

    Speed in m/sec = ( 5 / 18 ) x Speed in kms/hr.
    92.4 kms/hr = 92.4 x (5 / 18) m/sec.
    ∴ Req. distance = 92.4 x ( 5 / 18 ) x 600 meters
    = 15400 m.



  1. if a man cover 10.2 km. in 3 hours. The distance covered by him in 5 hours is ?
    1. 18 km.
    2. 15 km.
    3. 16 km.
    4. 17 km.

  1. View Hint View Answer Discuss in Forum

    Speed = 10.2 / 3 km/hr.
    = 3.4 km/hr.

    Distance covered in 5 hours = 3.4 X 5 km.

    Correct Option: D

    Speed = 10.2 / 3 km/hr.
    = 3.4 km/hr.

    Distance covered in 5 hours = 3.4 X 5 km.
    = 17 km


  1. A man crosses a streets 600 m long in 5 minutes. His speed in km per hour is ?
    1. 7.2
    2. 3.6
    3. 10
    4. 8.4

  1. View Hint View Answer Discuss in Forum

    Speed = 600 / (5 x 60) m/sec.

    Correct Option: A

    Speed = 600 / (5 x 60) m/sec.
    = 600 / (5 x 60) x 18/5 km/hr.
    = 7.2 km/hr.



  1. A and B are two towns. Mr. Faruqui covers the distance from A to B on cycle at 16 km/hr. however, he cover the distance from B to A on foot at 9 km/hr. his average speed during the whole journey is ?
    1. 12.5 km/hr.
    2. 10.25 km/hr.
    3. 11.52 km/hr.
    4. 12.32 km/hr.

  1. View Hint View Answer Discuss in Forum

    Average Speed = Total distance / time
    = 2d / [( d / 16) + ( d / 9)]

    Correct Option: C

    Average Speed = Total distance / time
    = 2d / [( d / 16) + ( d / 9)]
    = ( 2 x 16 x 9 ) / ( 16 + 9 ).
    = 11.52 km/hr.

    Shortcut :

    Average speed = 2uv / (u + v)
    = ( 2 x 16 x 9 ) / ( 16 + 9 )
    = 11.52