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November Maths Puzzle

November Maths Puzzle - 24 November

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

For Solution : Click Here


  1. Only 1km; as after 1hr the difference bw the girl and the boy is 1km.simple.

  2. Since the dog run @10kmph,it would travel 10km (5 rounds each round 2 km)

  3. It should be 10KM.

  4. Can any one plz explain how it is 10km

  5. the answer is 2km....
    the distance between them is 1km and dog has to move to and fro so it should travel 2km.

  6. The question is how far from the starting point, the dog can't move more far than the fastet people, only 6 Km

  7. of course its 10km per hour

  8. The dog is running a constant speed of 10km an hour, it doesn't matter where he is running its going to cover 10kms.

  9. The distance travelled by dog in one hour is obviously 10km.
    But the question here is how far the dog travels from the starting point after 1 hour.
    After 1 hour the boy is 5 km away from the starting point and the girl is 6km away.
    the dog is in between them.
    this problem is not as easy as its rated!

  10. 10km. Because the dog's speed is 10 km/h.
    Where the boy and girl are has no effect on answering this puzzle.
    Visit us @

  11. The question states "How far does the dog travel", not "where is the dog after one hour".

    Total distance = speed * time = 10km/h * 1h = 10km.

  12. i think 5km from the starting point

  13. The dog does not slow down on the turn.TURN 0 km