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A motor car is going due north at a spee...

A motor car is going due north at a speed of 50 km/h. It makes a `90^0` left turn without changing the speed. The change in the velocity of the car is about

A

`50 km//h` towards test

B

`70 km//h` towards south-west

C

`70 km//h` towards north-west

D

zero

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The correct Answer is:
B
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