Question
A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is:
Answer: Option C
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Total time taken = \(\left(\frac{160}{64}+\frac{160}{80}\right)hrs.=\frac{9}{2}hrs.\)
Therefore Average speed =\(\left(320\times\frac{2}{9}\right)km/hr = 71.11km/hr.\)
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