Physics(Please help)

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What is the smallest number of whole logs (ñ = 725 kg/m3, radius = 0.0800 m, length = 3.60 m) that can be used to build a raft that will carry four people, each of whom has a mass of 60.0 kg?

I do not know how to start this.

  • Physics(Please help) -

    20 logs

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