A man travels 28km at 7km/hr,next 16km at 4 km/hr and remaining 6km at 3km/hr.Find his average speed?(Infosys)
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formula = total distance covered
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total time taken
= 28 + 16 + 6
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4 + 4 + 2
= 50
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10
= average speed = 5 km / hr
hope this may help u.
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