A Navy captain going away from a lighthouse at the speed of 4[(âˆš3) â€“ 1] m/s. He observes that it takes him 1 minute to change the angle of elevation ofÂ the top of the lighthouse from 60 to 45 deg. What is the height (in metres) of the lighthouse?

A Navy captain going away from a lighthouse at the speed of 4[(âˆš3

1.	A Navy captain going away from a lighthouse at the speed of 4[(âˆš3) â€“ 1] m/s. He observes that it takes him 1 minute to change the angle of elevation ofÂ the top of the lighthouse from 60 to 45 deg. What is the height (in metres) of the lighthouse?
A.	240âˆš3
B.	480[(âˆš3) â€“ 1]
C.	360âˆš3
D.	280âˆš2
Answer» B. 480[(âˆš3) â€“ 1]

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A Navy captain going away from a lighthouse at the speed of 4[(âˆš3) â€“ 1] m/s. He observes that it takes him 1 minute to change the angle of elevation ofÂ the top of the lighthouse from 60 to 45 deg. What is the height (in metres) of the lighthouse?

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