If the mean proportional between 5 and 125 is x and the mean proportional between 44 and 62 is y, find the value of 2x : y
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 25 : 48.
x = √(5 × 125) = √625 = 25
y = √(44 × 62) = √(256 × 36) = √9216 = 96
2x : y = 50 : 96 = 25 : 48