Question

The geometric mean of two numbers is 45. if one of them is 9, find the other.

Answer 1

$if \: \: \: a \: and \: b \: \: \: are \: two \: numbers$
$their \: geometric \: mean \: is \sqrt{a \times b}$
$given \: a = 9 \: \: and \: mean \: = 45$
$thus \: b = \frac{ {45}^{2} }{9} = 225$