In a race of 1000 m, A beats B by 100 m ...

In a race of 1000 m, A beats B by 100 m or 10 seconds. If they start a race of 1000 m simultaneously from the same point and if B gets injured after running 50 m less than half the race length and due to which his speed gets halved, then by how much time will A beat B?

A

65 seconds

B

60 seconds

C

50 seconds

D

45 seconds

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