Zankrut covers three successive 2 km laps at speed of 20 kmph, 30 kmph, 40 kmph respectively.
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Zankrut covers three successive 2 km laps at speed of 20 kmph, 30 kmph, 40 kmph respectively. His average speed over this distance is:
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Answer: B. B) 13.8 kmph
The correct option is B: '13.8 kmph'.