Question

Find the mean proportional between $6.25$ and $0.16$.

• A. $2$
• B. $3$
• C. $1$
• D. $4$

Answer 1

The correct option is C $1$

Let the mean proportional between $6.25$ and $0.16$ be $x$.
$\Rightarrow 6.25,x$ and $0.16$ are in continued proportion.
$\Rightarrow 6.25:x=x:0.16$
$\Rightarrow x\times x=6.25\times 0.16$
$\Rightarrow x^2=1$
$\Rightarrow x=1$