Question:
Which value is the mean proportional between 18 and 45?
18 और 45 के बीच कौन सा मान माध्य आनुपातिक है?
Options :
- a) 10√17
- b) 9√10
- c) 20√7
- d) 25√5
- a) 10√17
- b) 9√10
- c) 20√7
- d) 25√5
correct answer : b)
Explanation :
Mean proportional x = √(a × b) = √(18 × 45) = √(9 × 2 × 9 × 5) = 9√10.
माध्य आनुपातिक x = √(a × b) = √(18 × 45) = √(9 × 2 × 9 × 5) = 9√10।