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P is a point moving with constant speed 10 m/s such that its velocity vector always maintains an angle 60° with line OP as shown in figure (O is a fixed point in space). The initial distance between O and P is 100 m. After what time shall P reach O.

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An Intiative by Sri Chaitanya

20 sec.

10 sec.

$20 \sqrt{3} s e c$

15 sec.

answer is C.

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Detailed Solution

100 = (10cos60)t

t = 20 sec

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