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Australian AMC 2011 - Intermediate Question 15

AMC AUSTRALIA · Australian AMC 2011 - Intermediate

Question 15

Two tourists are walking 12 km apart along a flat track at a constant speed of 4 km/h. When each tourist reaches the slope of a mountain, he begins to climb with a constant speed of 3 km/h.

Question illustration

Question illustration

What is the distance, in kilometres, between the two tourists during the climb?
  1. 16
  2. 12
  3. 10
  4. 9
  5. 8