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Question
A car completed a journey of 400 km in $$12\frac{1}{2}$$ hrs. The first $$\frac{3}{4}$$ of the journey was done at 30 km/hr. Calculate the speed for the rest of the journey.
Options:
A .  45 km/hr
B .  40 km/hr
C .  25 km/hr
D .  30 km/hr
Answer: Option B

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