A thin metallic wire having cross sectional area of $10^{-4} \mathrm{~m}^2$ is used to make a ring of radius $30 \mathrm{~cm}$. A positive charge of $2 \pi \mathrm{~C}$ is uniformly distributed over the ring, while another positive charge of 30 $\mathrm{pC}$ is kept at the centre of the ring. The tension in the ring is ______ $\mathrm{N}$; provided that the ring does not get deformed (neglect the influence of gravity). (given, $\frac{1}{4 \pi \epsilon_0}=9 \times 10^9$ SI units)