Question

If $\sqrt{1+\frac{25}{144}}=\frac{x}{12}$ then x equals

• A. 1
• B. 11
• C. 13
• D. 7

Answer 1

The correct option is C 13

$\sqrt{1+\frac{25}{144}}=\frac{x}{12}$

$\Rightarrow \sqrt{\frac{169}{144}}=\frac{x}{12}$

$\Rightarrow \frac{x}{12}=\frac{13}{12}$

$\Rightarrow x=\frac{13}{12}\times 12$

$\Rightarrow x=13$