KEAM 2013 Physics and Chemistry Paper

The reaction A + B → products is first order with respect to A and second order with respect to B. When 1.0 mol each of A and B were taken in one litre flask, the initial rate of the reaction is 1.0×10−2‌mol‌lit−1‌s−1, The rate of the reaction when 50% of the reactants have been converted into products is