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Mathematics, 09.03.2020 20:59 danbat3023

A lighthouse is located on a small island 5 km away from the nearest point P on a straight shoreline and its light makes nine revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P?

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A lighthouse is located on a small island 5 km away from the nearest point P on a straight shoreline...
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