Answer
Radius of the circle: 0.35 km
Work Step by Step
Diameter of a Circle: $d$ = 2$r$
Therefore:
0.7 km = 2($r$)
$r$ = 0.7 km / 2
$r$ = 0.35 km
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.