3 boxes have some average weight .when one box which weight 89kg is replaced by another box ,the average weight increases by 5kg .how much the new box weight​?

3 boxes have some average weight .when one box which weight 89kg is replaced by another box ,the average weight increases by 5kg .how much the new box weight​?

Explanation

Since the increasing average is 5 kg so the weight of each box would increase 5 kg So the total increase in weight = 5 x 3 = 15 kg   

Weight of new box to be = 98 + 14 = 104 kg