A raft is made of 10 logs lashed together. Each is 40 cm
 in diameter and has a length of 6.1 m
 .How many people can the raft hold before they start getting their feet wet, assuming the average person has a mass of 66  kg
  ? Do not neglect the weight of the logs. Assume the specific gravity of wood is 0.60.
Express your answer using two significant figures.