1.

A Navy captain going away from a lighthouse at the speed of 4(√3 – 1) m/s. He observes that it takes him 1 minute to change the angle of elevation of the top of the lighthouse from 60° to 45°. What is the height (in metres) of the lighthouse?

A. 240√3
B. 480(√3 – 1)
C. 360√3
D. 280√2
Answer» B. 480(√3 – 1)


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