Chemical Kinetics Part 2

For a reversible reaction A⇌B, the ∆H‌forward reaction ‌=20‌kJ‌mol−1. The activation energy of the uncatalysed forward reaction is 300‌kJ‌mol−1. When the reaction is catalysed keeping the reactant concentration same, the rate of the catalyzed forward reaction at 27∘C is found to be same as that of the uncatalysed reaction at 327∘C. The activation energy of the catalyzed backward reaction is _______ KJ‌mol−1.