Beach Day by Rodger Bliss
October 2022
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Battle Ship

A ship is battling against the tide to safety. It uses 9.5 gallons of fuel every hour and sails at 23 mph. It is 34 miles from safety but the flow against it is 12 mph. It has 30 gallons of fuel left. Will it reach safety?

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4 guesses to Battle Ship


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  • yes with fule to spare

  • Can you elaborate? As is, it’s not the answer we were looking for.

    Let’s see your work.

  • Paul

    Yes – At eleven mph (sailing at 23 mpg – tide at 12 mph) it will take 3.09 hours. With 9.5 gallons per hour, the ship would consume, at most, 29.36 gallons. Additionally, as the ship became lighter due to less fuel and the tide possibly lessens, the ship will get more that eleven mpg.

  • That is the answer we were looking for.

    Yes, by the skin of it’s teeth.

    You see, it’s gaining 11 mph, which will take 3 hours and 5.5 minutes to arrive. It will take approximately 29.75 gallons of gas to get there. Whew! That was a close one!!!

    Great job! You’re today’s winner.