The ratio of the third proportional to 12 and 30 and the mean proportional between 9 and 25 is: 12 और 30 के तीसरे समानुपाती (third proportional) और 9 और 25 के बीच के माध्य समानुपाती (mean proportional) का अनुपात है:
A
2 : 1 (2 : 1)
B
5 : 1 (5 : 1)
C
7 : 15 (7 : 15)
D
9 : 14 (9 : 14)
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Correct Answer 5 : 1
Explanation
Third Prop (c) = b^2/a = 30*30/12 = 75. Mean Prop (x) = sqrt(a*b) = sqrt(9*25) = 15. Ratio = 75 : 15 = 5 : 1.