A uniform meter scale weighs 75 g. It is pivoted at the 50 cm mark. A 40 g mass is placed at the 20 cm mark and a 50 g mass is placed at the 90 cm mark. Where should a 20 g mass be placed so that the scale is in equilibrium?
1
At the 54 cm mark
2
At the 96 cm mark
3
At the 4 cm mark
4
At the 10 cm mark