Temperature coefficient of a reaction is 3.  At  300 K,  rate of reaction is ‘X’.  Rate of reaction at 330 K would be

Temperature coefficient is 3. It means that rate of reaction triples for every ${10}^0\mathrm{c} \mathrm{or} 10\mathrm{K}$. 

$$\begin{gathered} \mathrm{Rate} \mathrm{at} \\ 300\mathrm{K} 310\mathrm{K} 320\mathrm{K} 330\mathrm{K} \\ \mathrm{X} 3\mathrm{X} 9\mathrm{X} 27\mathrm{X} \end{gathered}$$