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Questions  >>  CBSE XI  >>  Physics
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Q)

One car is moving on a straight road covers one third of the distance with $20\;km/hr$ and rest with $60\;km/hr$. The average speed

$\begin{array}{1 1} (a) \;40\;km/hr \\ (b) \;80\;km/hr \\ (c) \;46 \;\frac{2}{3}\;km/hr \\ (d) \;36\;km/hr\end{array} $

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