The present research paper discusses the comparative study of the life time of black holes due to Non-relativistic and Relativistic effect using the model Γ = 2.098(M/M⊕)3×1067 years as proposed by Stephen Hawking and the model for variation of mass with velocity which concludes that the life time of the black holes due to relativistic effect is greater than to the life time of the black holes due to non-relativistic effect and also twice to the life time of black holes of mass equal to the sun due to non-relativistic effect having velocity equal to the velocity of light.
