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Raft is 4.2m wide and 6.4m long. when horse is loaded onto raft, the raft sinks 3 cm deeper into the water. Find the weight of the horse.

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Horse's weight = (additional displaced water volume) * density of water) * g

The additional displaced water is
delta V = (raft area)*0.030 m

W = (4.2)*(6.4)*(0.03)*1000*9.8 newtons

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