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65.
A train accelerates from rest at a constant rate a for some time and then it retards to rest at the constant
rate B. If the total distance covered by the train is s, then the velocity of the train is
a +B
(a)
2aß
a-B
(b)
2aß
2aß
(c)
a +B
2aß
(d)
a -B

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