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Question

Two cars P and Q starts from a point at the same time in a straight line and their positions are represented by xp(t)=at+bt2 and xQ(t)=ftt2. At what time do the cars have the same velocity?

A
fa2(1+b)
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B
af1+b
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C
a+f2(b1)
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D

a+f2(1+b)
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