What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20oC to 35oC? (R = 8.314 J mol$-$1 K$-$1)

Question

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20^oC to 35^oC?
(R = 8.314 J mol^$-$1 K^$-$1)

34.7 kJ mol^$-$1

15.1 kJ mol^$-$1

342 kJ mol^$-$1

269 kJ mol^$-$1

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