Speed, Time and Distance

Speed, Time and Distance

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Aptitude miscellaneous
  1. Gautam travels 160 kms at 32 kmph and returns at 40 kmph. Then his average speed is








  1. View Hint View Answer Discuss in Forum

    Here, distances are equal.

    ∴  Average speed =
    2xy
    		kmph.
    x + y

    =
    2 × 32 × 40
    		 kmph.
    32 + 40

    =
    2 × 32 × 40
    		 kmph.
    72

    =
    320
    		 kmph. = 35.55 kmph.
    9

    Correct Option: D

    Here, distances are equal.

    ∴  Average speed =
    2xy
    		kmph.
    x + y

    =
    2 × 32 × 40
    		 kmph.
    32 + 40

    =
    2 × 32 × 40
    		 kmph.
    72

    =
    320
    		 kmph. = 35.55 kmph.
    9

  1. A car travels from A to B at the rate of 40 km/h and returns from B to A at the rate of 60 km/h. Its average speed during the whole journey is








  1. View Hint View Answer Discuss in Forum

    Here, distance is same.

    ∴  Average speed =
    2xy
    x + y

    =
    2 × 40 × 60
    		 kmph.
    40 + 60

    =
    2 × 40 × 60
    		 kmph.
    100

    = 48 kmph.

    Correct Option: A

    Here, distance is same.

    ∴  Average speed =
    2xy
    x + y

    =
    2 × 40 × 60
    		 kmph.
    40 + 60

    =
    2 × 40 × 60
    		 kmph.
    100

    = 48 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. 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

  1. Gautam goes to office at a speed of 12 kmph and returns home at 10 kmph. His average speed is :








  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 man goes from Mysore to Bangalore at a uniform speed of 40 km/hr and comes back to
    Mysore at a uniform speed of 60 km/hr. His average speed for the whole journey is








  1. View Hint View Answer Discuss in Forum

    Average speed =
    2xy
    		kmph
    x + y

    =
    2 × 40 × 60
    		kmph
    40 + 60

    = 48 kmph

    Correct Option: A

    Average speed =
    2xy
    		kmph
    x + y

    =
    2 × 40 × 60
    		kmph
    40 + 60

    = 48 kmph