Question

$\frac{\sqrt{0.49}}{0.25}\times \frac{\sqrt{0.81}}{0.36}$ is equal to

• A. $7$
• B. $2\frac{9}{10}$
• C. $7\frac{9}{10}$
• D. $9\frac{9}{10}$

Answer 1

The correct option is A $7$

$\frac{\sqrt{0.49}}{0.25}\times \frac{\sqrt{0.81}}{0.36}=\frac{0.7}{0.25}\times \frac{0.9}{0.36}$

$=\frac{0.7\times 0.9}{\frac{25}{100}\times 0.36}$

$=\frac{0.63}{\frac{1}{4}\times 0.36}$

$=\frac{0.63}{0.09}$

$=\frac{63}{9}=7$