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Motion In A Straight Line

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MCQ+4 / -12024

A train starting from rest first accelerates uniformly up to a speed of \(80 \mathrm{~km} / \mathrm{h}\) for time \(t\), then it moves with a constant speed for time \(3 t\). The average speed of the train for this duration of journey will be (in \(\mathrm{km} / \mathrm{h}\)) :

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