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The distance between two particles is de...

The distance between two particles is decreasing at the rate of 6 m/sec. If these particles travel with same speeds and in the same direction, then the separation increase at the rate of 4 m/sec. The particles have speed as

A

5m`//`sec,1m`//`sec

B

4m`//`sec,1m`/`/sec

C

4 m`//`sec,2 m`/`/sec

D

5 m`//`sec,2 m`//`sec

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