West Bengal Board Solutions for Chapter: Square Root, Exercise 3: Let's work out-18.1

$\sqrt{13\times 13}=$ _____.

Find the square root by finding factors: $169$

Find the square root by finding factors: $225$

Find the square root by finding factors: $4^2+3^2$

Find the square root by finding factors: $144$

Find the square root by finding factors: $576$

Find the square root by finding factors: ${15}^2+{20}^2$

Find the square root by finding factors: $900$