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Question: In a scaffolding used in construction, there is a plank 50 by 300 mm rough sawn used to support the workmen. The plank is held up by means of brackets 2.4 m apart. If a person having a mass of 91 kg stands at the middle and a person having a mass of 68 kg stands 0.3 m from the left end, could Eastern white pine be used for the plank? p = 705 kg/m3 for Eastern white pine.

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