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UPSC NDA 2 2016 Mathematics Solved Paper

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Question : 49

Total: 120

A moving boat is observed from the top of a cliff of 150 m height. The angle of depression of the boat changes from 60° to 45° in 2 minutes. What is the speed of the boat in metres per hour?

4500
√3
4500(√3−1)
√3
4500√3
4500(√3+1)
√3

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