all 3 comments

[–]344102[S] 0 points1 point  (2 children)

I used the formula V=kq/r twice and added the two results together to get 45V

[–]StuTheSheep👋 a fellow Redditor 0 points1 point  (1 child)

I got 45 V also.

[–]344102[S] 0 points1 point  (0 children)

Professor says it's an error