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A container ship left the pier and traveled toward a marina An aircraft carrier left six hours later traveling 9km/h faster in an effort to catch up to it. After 4 fours the aircraft carrier finally caught up. Find the container ship's average speed.

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sqdancefan

Answer:

  6 km/h

Step-by-step explanation:

After 4 hours at a speed difference of 9 km/h, the carrier made up a distance of ...

  (4 h)(9 km/h) = 36 km

This head start was achieved by the container ship in 6 hours, so it speed was ...

  (36 km)/(6 h) = 6 km/h

The container ship's average speed was 6 km/h.

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