Question

A uniform plank of a see-saw is 5 m supported at its centre. A boy weighing 40 kgf site at a distance of 1.5 m from one end of the see-saw.
long and is
Where must a boy weighing 25 kgf sit on the
other end of see-saw, so as to balance the first boy?
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Answer 1

Answer:

see the answer in the attachment please mark as brainlist