What is the ratio of the mean proportional of 1.21 and 0.09 with the mean proportional of 0.16 and 0.36?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 11 : 8.
The mean proportional between two numbers a and b = √(a × b)
According to the question;
⇒ Mean proportional of 1.21 and 0.09 : Mean proportional of 0.16 and 0.36
⇒ √(1.21 × 0.09) : √(0.16 × 0.36)
⇒ 1.1 × 0.3 : 0.4 × 0.6
⇒ 11 : 8