If the mean proportional of A and 27 is 18, then find the value of A.

Correct option is A

Given:
Two numbers: A and 27
Mean proportional = 18
Formula Used:
Mean proportional of two numbers a and b = $$\sqrt{a \times b}$$​​
Solution:
Set up the equation based on the formula:
​$$\sqrt{A \times 27} = 18$$​​
Square both sides to remove the square root:
​$$A \times 27 = 18^2 = 324$$​​
A = $$\frac{324}{27}$$​​
A = 12
Final Answer
So the correct answer is (a)