a) state a condition under which a body moves in such a way that a magnitude of its average velocity is equal to its average speed
b) a train starting from the rest moves with a uniform acceleration of 0.2 m/s2​  for five minutes.

Dear Student 
Your second question is incomplete. I am giving answer assuming your are asking about final velocity or distance covered.

Regards

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A) when the body is moving in a straight line.
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