The Escape Velocity of a Rocket Launched from Position A,the

The escape velocity of a rocket launched from position A,the center of the three planet system depicted in the figure is 12.6 km/s.Each planet has mass M = 10²⁴ kg,radius R ,and the center-to-center distance between any two planets is 10 R.What is the radius of one of the three planets?

A) 2.29 * 10⁶ m
B) 1.00 * 10⁶ m
C) 4.29 * 10⁶ m
D) 4.37 * 10⁵ m
E) 9.42 * 10⁵ m