\(t = \frac{d}{v}{\rm{\,\,also \,\,}}v \propto \sqrt T \)
\(\Rightarrow \frac{{{t_1}}}{{{t_2}}} = \frac{{{v_2}}}{{{v_1}}} = \sqrt {\frac{{{T_2}}}{{{T_1}}}} \)
==> \(\frac{2}{{{t_2}}} = \sqrt {\frac{{303}}{{283}}} \)
\( \Rightarrow \)\({t_2}= 1.9 \,sec.\)