A and B decompose via first order kinetics with half-lives 54.0 min and 18.0 rain respectively. Star — Chemical Kinetics Chemistry Question

Question

A and B decompose via first order kinetics with half-lives 54.0 min and 18.0 rain respectively. Starting from an equimolar non reactive mixture of A and B, the time taken for the concentration of A to become 16 times that of B is ____min (Round off to the Nearest Integer).