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Q.

A person is running on a horizontal road in vertically falling rain with a speed of 6 km/hr. He observes that the rain is falling on him at an angle of $30^{\circ}$ with the vertical. The velocity of the rain will be

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a

$2 \sqrt{3} k m / h r$

b

$6 \sqrt{3} k m / h r$

c

$6 k m / h r$

d

$2 k m / h r$

answer is B.

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$\begin{array}{l} \frac{6 km / hr}{V_{rain}} = \tan 30^{0} \\ V_{rain} = 6 \sqrt{3} Km / hr \end{array}$

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