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.

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