A lighthouse is located on a small island 3km away from the nearest point P on a straight shoreline and its light makes four revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1km from P?

Question

hero · Answer

Ugh, I've seen this before. The solution for this is insane

anonymous · Answer

pellet i know haha i gotta intergrate some sort of formula and some other stuff

anonymous · Answer

doodoo*

anonymous · Answer

i cant swear

hero · Answer

I'll save you the headache. Go here: http://online.math.uh.edu/HoustonACT/videocalculus/H.264/09-rates-H264.mov