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Quantitative Aptitude

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A lighthouse ...

Question

A lighthouse facing north, sends out a beam of light extending from north-east to the north-west. An observer on a steamer sailing due west, first sees the light when he is 5 km away from the light house and continues to see it for $30 \sqrt{2}$ minutes. What is the speed of the steamer?

A

10 k m p h

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B

10 \sqrt{3} k m p h

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C

20 k m p h

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D

20 \sqrt{3} k m p h

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Solution

The correct option is A $10 k m p h$
The correct answer is option (a). Check the video for the approach.

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