Answer:
\[\upsilon
\propto \,\sqrt{T}\].
Let
\[{{\theta }^{o}}C\] be the temperature at which
\[\upsilon
=\,3\] times
\[\upsilon \] at
\[{{0}^{o}}c\].
\[\therefore
\] \[\frac{{{\upsilon }_{\theta }}}{{{\upsilon }_{\theta
}}}\,=\sqrt{\frac{273+\theta }{273}}\]
or \[3=\,\sqrt{\frac{273+\theta
}{273}}\,\] or
\[273\,+\,\theta \,=\,9\,\times \,273\]
\[\therefore
\] \[\theta =\,283\,\times \,8\,={{2184}^{o}}C\]
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