\(v=-\frac{(\text { coeffecient of } t)}{(\text { coeffecient of } x)}\)
\(v=-\frac{1000}{(-3)}=\frac{1000}{3}\)
since speed of wave \(\propto \sqrt{T}\)
\(\mathrm{So}=\frac{1000}{\frac{3}{336}}=\sqrt{\frac{273}{\mathrm{T}}}\)
\(\Rightarrow T=277.41 \mathrm{K}\)
\(\mathrm{T}=4.41^{\circ} \mathrm{C}\)