Gilligan is trying to escape a desert island with his friends. they make a raft is made from 10 logs lashed together. each log is 28.7 cm in diameter and has a length of 5.58 m. how many people can the raft hold before they start getting their feet wet? assume each person has the average mass of 66.8 kg and that the density of water and wood is 1000 kg/m³ and 600 kg/m³, respectively