Isomerisation of gaseous cyclobutane to butadiene is a first-order reaction. At \( T(K) \), the rate constant of the reaction is \( 3.3 \times 10^{-4} \, \text{s}^{-1} \). What is the time required (in min) to complete 90% of the reaction at the same temperature? (log 2 = 0.3)