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Answer :
(i)
\(\qquad \begin{array}{c|lcr}
&1.6\\
\hline
1 &\;\; \;\bar{2.}\bar{56}\\
&-1\\
\hline
26 &\;\;\; 156\\
&\;\;\; 156\\
\hline
&\;\;\;\;\; 0\\
\hline
\end{array}
\)
Hence we have, \(\sqrt{2.56}=1.6\)
(ii)
\(\qquad \begin{array}{c|lcr}
&2.7\\
\hline
2 &\;\; \;\bar{7.}\bar{29}\\
&-4\\
\hline
47 &\;\;\; 329\\
&\;\;\; 329\\
\hline
&\;\;\;\;\; 0\\
\hline
\end{array}
\)
Hence we have, \(\sqrt{7.29}=2.7\)
(iii)
\(\qquad \begin{array}{c|lcr}
&7.2\\
\hline
7 &\;\; \;\bar{51.}\bar{84}\\
&-49\\
\hline
142 &\;\;\; 284\\
&\;\;\; 284\\
\hline
&\;\;\;\;\; 0\\
\hline
\end{array}
\)
Hence we have, \(\sqrt{51.84}=7.2\)
(iv)
\(\qquad \begin{array}{c|lcr}
&6.5\\
\hline
6 &\;\; \;\bar{42.}\bar{25}\\
&-36\\
\hline
125 &\;\;\; 625\\
&\;\;\; 625\\
\hline
&\;\;\;\;\; 0\\
\hline
\end{array}
\)
Hence we have, \(\sqrt{42.25}=6.5\)
(v)
\(\qquad \begin{array}{c|lcr}
&5.6\\
\hline
5 &\;\; \;\bar{31.}\bar{36}\\
&-25\\
\hline
106 &\;\;\;\;\; 636\\
&\;\;\;\;\; 636\\
\hline
&\;\;\;\;\; 0\\
\hline
\end{array}
\)
Hence we have, \(\sqrt{31.36}=5.6\)