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A 400-kg child sits on the other end the beam balances when

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A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0-kg, and a 40.0-kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance 1.10-m from the 30.0-kg child. How long is the beam?

Reference no: EM13638577

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