Multiple choice general knowledge

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?

  1. 10

  2. 1

  3. 3

  4. 11
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The dog runs at a constant 10 km/h for exactly 1 hour, so it travels 10 km regardless of how many times it turns. The speeds of the boy and girl are irrelevant to the dog's total distance.

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