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Two cars travelling on a straight road c...

Two cars travelling on a straight road cross a kilometer stone A at the same time with velocities 20ms^(-1)&10ms^(-1) with constant accelerations of1ms^(-2)&2ms^(-2)n respectively.If they cross another kilometer stone B at the same instant,the distance between A and B is (A)600m,(B) 800m (C) 1000m

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