The area of a square field is$63504 {\mathrm{m}}^2$. How much time will a man take to complete one round along its boundary, if he cycles at a constant speed of $26.88 \mathrm{km}/\mathrm{h}?$
 

A gardener has$1300$saplings. He wants to plant these in such a way that the number of columns and the number of rows remain same. Find the least number of more saplings he needs for this.

Find the value of $\sqrt{117}\times \sqrt{1573}$

Find the value of $\sqrt{5.29}\times \sqrt{13.69}$

If the square root of $\frac{289}{361}$ is $\frac{k}{m},$ then find the value of $k+m.$

Find the square root of $\frac{961}{1369}$

Evaluate the following.

$\sqrt{1\frac{49}{576}}$