Mathematics
Medium
Question
The ratio of the radius of two circles is 1: 3, and then the ratio of their areas is_________?
A
1:3
B
1:6
C
1:9
✓ Official correct answer
D
1:5
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
1:3
No member explanations yet for this option.
B
1:6
No member explanations yet for this option.
C
1:9
No member explanations yet for this option.
D
1:5
No member explanations yet for this option.