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A piece of wood of mass 0.3 kg is droppe...

A piece of wood of mass 0.3 kg is dropped from the top of a 20 m height building. At the same time, a bullet of mass 0.2 kg is fired vertically upward, with a velocity 80m/s from the ground. The bullet strikes the wood and gets embedded in it. Then, the maximum height to which the combined system reaches above the top of the building before falling below is: (`g= 10m//s^2`)

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