Electric field changing formula variables problem

[kirby2]

If the electric field is E at a distance d from a point charge, its magnitude will be 2E at a distance?

ATTEMPT: i think the answer is d/sqrt(2). i used the formula E=(k)(q/d^2) and used test variables. Is this the right answer?

 

[SammyS]

If the electric field is E at a distance d from a point charge, its magnitude will be 2E at a distance?

ATTEMPT: i think the answer is d/sqrt(2). i used the formula E=(k)(q/d^2) and used test variables. Is this the right answer?

Yes. That's the right answer.