Question

The value of $\sqrt{225}$ equal to

• A. 12
• B. 15
• C. 18
• D. 21

Answer 1

The correct option is B

15

$\sqrt{225}$

$=\sqrt{3\times 75}$

$=\sqrt{3\times 3\times 25}$

$=\sqrt{3\times 3\times 5\times 5}$

$=\sqrt{3^2\times 5^2}$

$=3\times 5$

$=15$