Question

The square root of 1.44 equals to

• A. 1.42
• B. 1.24
• C. 1.4
• D. 1.2

Answer 1

The correct option is D

1.2

The given expression is $\sqrt{1.44}$

$\sqrt{1.44}$

$=\sqrt{\frac{144}{100}}$

$=\frac{\sqrt{144}}{\sqrt{100}}$

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

$=\frac{\sqrt{2^4\times 3^2}}{\sqrt{2^2\times 5^2}}$

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

$=\frac{12}{10}=1.2$