Question

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?

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