SOLUTION: A man rowing a boat away from a lighthouse 150m high takes 2 min to change the angle of elevation of the top of the lighthouse from 45 to 30 degree. find the speed of the boat.
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Question 696899: A man rowing a boat away from a lighthouse 150m high takes 2 min to change the angle of elevation of the top of the lighthouse from 45 to 30 degree. find the speed of the boat. Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! A man rowing a boat away from a lighthouse 150m high takes 2 min to change the angle of elevation of the top of the lighthouse from 45 to 30 degree. find the speed of the boat.
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His distance from the base = 150/tan
d1 = 150/1
d2 = 150/tan(30) = 150*sqrt(3) = 260 m
d2-d1 = 110 meters
r = 110/2 = 55 meters/min
