Chemical Kinetics

The rate for reaction \(\mathrm{A}+\mathrm{B} \rightarrow\) product, is \(1.8 \times 10^{-2} \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}\). Calculate the rate constant if the reaction is second order in \(\mathrm{A}\) and first order in \(\mathrm{B}\). (\([\mathrm{A}]=0.2 \mathrm{M} ;[\mathrm{B}]=0.1 \mathrm{M}\))