Find the least number which must be added to $9799$ so as to get a perfect square. Also, find the square root of the perfect square so obtained.

Find the square root of the following by division method.

$484$

Find the square root of $2025$ by division method.

Find the square root of $6.76$ by division method.

Find the square root of $11.56$ by division method.

Find the smallest number by which $9408$ must be divided, so that quotient is a perfect square. Find the square root of the quotient. 

$2025$ plants to be planted in a garden in such a way that each row contains as many plants as the number of rows. Find the sum of the number of rows and the number of plants in row.

Find the least number that must be added to $1700$, to get a perfect square. Also, find the square root of the result.

In a right angled $∆PQR, \angle Q=90°, PQ=6 \mathrm{cm}$ and $QR=8 \mathrm{cm}$. If $PR=k \mathrm{cm}$, then find the value of $k$.