On a see-saw two children of masses 30kg and 50kg are sitting on one side of it at distances 2 m and 2.5m respectively from its middle. Where should a man of mass 75 kg sit to balance it?

2.47 m

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3.47 m

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2.90 m

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1.48 m

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Solution

The correct option is A
2.47 m

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A boy of mass 30 kg is sitting at a distance of 2 m from the middle of a seesaw. Where should a boy of mass 40 kg sit so as to balance the see-saw?

Q. A boy of mass 30 kg sitting at a distance of 2m from the middle of see-saw. Where should a boy of mass 40 kg sit so as to balance the see -saw?

Two children sit on a see-saw which is 6 m long and pivoted on an axis at its center. The first child has a mass of 20 kg and sits at the left end of the see-saw, while the second child has a mass of 40 kg and sits somewhere on the see-saw to the right of the axis. At what distance from the axis should the second child sit to keep the see-saw horizontal?