The average weight of 12 crewmen in a boat is increased by \(\frac{1 }{3}\) kg, when one of the crewman whose weight is 55kg is replaced by a new man. What is the weight of that new man?

59 kg

Total increase in the weight of 12 crewmen = 12 × \(\frac{1}{3}\) = 4 kg

Weight of crewman = 55 + increase in weight

                               = 55 + 4 = 59 kg