A gun fires a lead bullet of temperature 300 K into a wooden block. The bullet having melting temperature of 600 K penet…

A gun fires a lead bullet of temperature 300 K 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 \(=2.5\times {10}^{4}{\mathrm{JKg}}^{-1}\) and specific heat capacity of lead \(=125{\mathrm{JKg}}^{-1}\) \({\mathrm{K}}^{-1}\) )

[JEE Main 2025, 23 Jan (Shift 1)]