In figure a block of mass 100 kg tied to a string of linear mass density 0.1 Kg/m . Find the velocity of wave produced in the string ? (neglect string mass) $\;(g=10\;m/s^{2})$

Question

$(a)\;10 \sqrt{10}\;cm/s\qquad(b)\;100\;m/s\qquad(c)\;100\;cm/s\qquad(d)\;1000\;cm/s$