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Two straight roads OA and OB intersect a...

Two straight roads OA and OB intersect at an angle `60^@. A ` car approaches O from A, where `OA = 700 m` at a uniform speed of 20 m/s, Simultaneously, a runner starts running from O towards B at a uniform speed of 5 m/s. The time after start when the car and the runner are closest is :

A

10 sec

B

15 sec

C

20 sec

D

30 sec

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Verified by Experts

The correct Answer is:
D
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