Question

The square root of 2.25 equals to

• A. 1.45
• B. 1.5
• C. 1.55
• D. 2.5

Answer 1

The correct option is B

1.5

The given expression is $\sqrt{2.25}$

$\sqrt{2.25}$

$=\sqrt{\frac{225}{100}}$

$=\frac{\sqrt{225}}{\sqrt{100}}$

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

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

$=\frac{3\times 5}{2\times 5}$

$=\frac{15}{10}=1.5$