A 10 meter long seesaw has a boy of mass 20 kg sitting on one end . How far away from him should a girl of mass 30kg sit to balance the seesaw?

Answer 1

I am not sure where the fulcrum is but if it is in the middle then:

20 * 5 = 30 * x
x = 5(2/3) = 10/3 from center
which is 10/3 + 5 from the boy
which is
25/3 = 8 1/3 meters from the boy