The number of electric field lines crossing an area $∆\mathrm{S}$ is ${\mathrm{n}}_1$ when normal of $\mathrm{\Delta }\overrightarrow{\mathrm{S}}$ is parallel to $\overrightarrow{\mathrm{E}}$, while number of field lines crossing same area is ${\mathrm{n}}_2$ when normal of $\mathrm{\Delta }\overrightarrow{\mathrm{S}}$ makes an angle of 30° with $\overrightarrow{\mathrm{E}}$. Then