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A man on tour travels first 160 km/hr 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 : |
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Answer: Option C Explanation: Total time taken = (160/64 + 160/8) hrs = 9/2 hrs. ∴ Average speed = (320 x 2/9) km/hr = 71.11 km/hr. |
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