There is a small hole in a table. A string of length 1 m passes through it. Two bodies of masses 70g and 100g are attached at its ends. The 100g mass  hangs freely at a depth of 60 cm from the table. If this mass is to be in equilibrium, the other mass should rotate in a circle with a frequency equal to
(1) $\frac{4\mathrm{\pi }}{140}\mathrm{Hz}$              (2) $\frac{\mathrm{\pi }}{140}\mathrm{Hz}$              (3) $\frac{\mathrm{\pi }}{\sqrt{140}}\mathrm{Hz}$              (4) $\frac{\sqrt{140}}{4\mathrm{\pi }}\mathrm{Hz}$