The mean proportional between 45 and a certain number is three times the mean proportional between 5 and 22. The number is ?
If X be the required number, then
(45 x X)1/2 = 3 x (5 x 22)1/2
45X = 9 x 110
X = 22
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The mean proportional between 45 and a certain number is three times the mean proportional between 5 and 22. The number is ? |
Answer |