A lead bullet strikes a target with a velocity of 480 $\mathrm{m}{\mathrm{ s}}^{-1}$. If the bullet falls dead, the rise in temperature of the bullet ($\mathrm{c}$ = 0.03 ${\text{cal g}}^{-1}{}^{\text{o}}{\text{C}}^{-1}$ ), assuming that heat produced is equally shared between the bullet and target is