The weight of four rowers of a boat are respectively 70kg, 73kg, 72kg and 74kg and the average weight of whole crew, including the coxswain is 70kg. Find the weight of the coxswain.

Let the weight of coxswain is x km.Therefore, 70+73+72+74+x5=70289+x5=70289+x=350x=350-289x=61Hence, weight of coxswain is 61 km

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