A "Teeter-Totter" (Or "See-Saw" If You Prefer) Has a 200 $1 \mathrm {~m}$

Short Answer

A "teeter-totter" (or "see-saw" if you prefer) has a 200 N child sitting at one end, 3 m from the center pivot point (fulcrum).How far from the center point should a 500 N adult sit in order
To balance the teeter-totter? a. $1 \mathrm {~m}$
b. $1.2 \mathrm {~m}$
c. $3 \mathrm {~m}$
d. $5 \mathrm {~m}$