JEE Main 2025 Physics question

A gun fires a lead bullet of temperature 300K into a wooden block. The bullet having melting temperature of 600 K penetrates into the block and melts down. If the total heat required for the process is 625 J, then the mass of the bullet is grams. (Latent heat of fusion of lead = JKg⁻¹ and specific heat capacity of lead = 125 JKg⁻¹K⁻¹)

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