Question: 3 - 1 6 3 A raft is made using a number of logs with 2 5 cm diameter and 2 m long, as shown

3-163 A raft is made using a number of logs with 25 cm diameter and 2 m long, as shown in the figure. It is desired that a maximum 90 percent volume of each log will be submerged when carrying two boys weighing 400 N each. Determine the minimum number of logs that must be used. The specific gravity of the wood is 0.75.
FIGURE P3-163
3 - 1 6 3 A raft is made using a number of logs

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