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A white car running at a speed of 72 km/...

A white car running at a speed of 72 km/hr is approaching a black car at a speed of 54 km/hr from a distance of 32 m behind. In how much time will it cross the black car?

A

3.6 sec

B

4.8 sec

C

5.5 sec

D

6. 4 sec

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