SOLUTION: In a 28 km marathon, Mike completes the race while Nathan is 4 km behind the finish line, and Oliver is 6 km behind Nathan. The number of kilometers Oliver must still run when Nath

Question 1095743: In a 28 km marathon, Mike completes the race while Nathan is 4 km behind the finish line, and Oliver is 6 km behind Nathan. The number of kilometers Oliver must still run when Nathan finishes is
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

In the time that Mike runs the full 28km, Nathan runs 24km, and Oliver runs 18km. Comparing those distances for Nathan and Oliver, we can see that Oliver runs 3/4 as fast as Nathan (18/24 = 3/4).

When Nathan finishes the full 28km, Oliver will have run 3/4 of 28km, or 21km; so he still has 7km to run when Nathan finishes.
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