Three children are trying to balance on a seesaw. The seesaw is 3.9 m long and pivots about a rock at its center. Louie and Laura are already sitting on opposite ends. If Martha weighs 27 kg, where should she sit so as to balance the seesaw?

Question

50kg kid--------------35kg kid
--------- is the seesaw

Answer 1

3.9/2 = 1.95
left of pivot --- right of pivot
50(1.95) = 27 x + 35(1.95)

27 x = 15(1.95)

x = 15(1.95)/27 to the right of pivot

Answer 2

1.08