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To a man going east in a car with veloci...

To a man going east in a car with velocity of 40 km/h., a train appears to move towards north with a velocity of `40sqrt3` km/h. The magnitude of actual velocity of the train is

A

30 km/h

B

60 km/h

C

80 km/h

D

120 km/h

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The correct Answer is:
C
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