Asked Nov 15, 2019

A lighthouse is located on a small island 4 km away from the nearest point P on a straight shoreline and its light makes seven revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P?


Expert Answer

Step 1

Let y be the distance of lighthouse from nearest point on the shoreline and at time t, the beam light at a distance of x km from...


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Р. х ө L


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