Mathematics
NULL
Medium
Question
The ratio of the radii of two circles is 1 : 3. Then the ratio of their areas is _________?
A
0.04375
B
0.045833333333333
C
0.047916666666667
✓ Official correct answer
D
0.045138888888889
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
0.04375
No member explanations yet for this option.
B
0.045833333333333
No member explanations yet for this option.
C
0.047916666666667
No member explanations yet for this option.
D
0.045138888888889
No member explanations yet for this option.
Explanation
Area ratio = 1² : 3² = 1 : 9. The listed options do not show that ratio.