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Girl, Boy and Dog - Solution
Puzzles -> Measuring Puzzles
 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? |
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The Solution . . .
10km. Because the dog's speed is 10 km/h.
Where the boy and girl are has no effect on answering this puzzle.
But if you asked WHERE the dog is after 1 hour … that would be a very hard question to answer. |
Discuss this puzzle at the Math is Fun Forum
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