JEE Main 2021 Chemistry question

The reaction rate for the reaction [PtCl_4]^{2-}+H_2O\rightleftharpoons[Pt(H_2O)Cl_3]^-+Cl^- was measured as a function of concentrations of different species. It was observed that \frac{-d[[PtCl_4]^{2-}]}{dt}=4.8\times10^{-5}[[PtCl_4]^{2-}]-2.4\times10^{-3}[[Pt(H_2O)Cl_3]^-][Cl^-] where square brackets are used to denote molar concentrations. The equilibrium constant =. (Nearest integer)