The `PE` of three objects of masses `1kg,2kg` and `3kg` placed at the three vertices of an equilateral triangle of side `20cm` is

Find the PE of three objects of masses 1 kg, 2 kg and 3 kg placed at the three vertices of an equilateral triangle of side 20 cm.

Find the PE of three objects of masses 1kg , 2kg and 3kg placed at the three vertices of an equilateral triangle of side 50cm ?

Find the position of centre of mass of the system of 3 objects of masses 1 kg, 2kg and 3 kg located at the corner of an equilateral triangle of side 1 m. Take 1 kg mass object at the origin and 2kg along x-axis.