Gravity at r is 9.8m/s square . If planet is made up same material but 2×r . What is the value of g.

Gravity at r is 9.8m/s square . If planet is made up same material but

1.	Gravity at r is 9.8m/s square . If planet is made up same material but 2×r . What is the value of g.
Answer» Sorry...... gravity will be 1/4 times the previous one.... Gravity will be 4 times the previous one...