Question

A ship can cover a certain distance in hours at a speed of nautical miles per hour. By how much should its speed be increased so that it takes only hours to cover the same distance? (A nautical mile in a unit of measurement used at sea distance or sea water i.e., metres)

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Solution

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Speed

  Distance = speed time

  Since it is given that the distance travelled will be the same . 


  nautical miles per hour. 

hours 

    hours

  

 

nautical miles per hour. 

So the ship has to increase its speed from to natical miles per hour . 

It has to increase its speed by " nautical miles per hour"

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