A boy of mass 30kg is sitting at a distance of 2m from the middle of a see saw . where should a boy of mass 40kg sit , so as to balance the see saw ?
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let the see saw of 4m whole
then the boy is at one end
the ratio should be like
x/2 = 40 /30
x /2 = 3/4
x = 6/4
x = 3/2
x = 1.5 m from middle
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