Tuesday, 30 July 2013

Girl, Boy and Dog

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?

Click here for answer....

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