QUESTION $2[5$ MARKS$]$

A valve is provided at the end of a cast iron pipe of $150$ mm diameter and thickness of $10$ mm $.$ The water is flowing through the pipe, which is suddenly stopped by closing the valve. Find the maximum velocity of water when the rise of pressure due to sudden closure of valve is $196\mathrm{.}2\frac{N}{c}{m}^2.$ Take $K$ for water as $19\mathrm{.}62{10}^4\frac{N}{c}{m}^2$ and $E$ for cast iron pipe as $11\mathrm{.}772{10}^6\frac{N}{c}{m}^2.$