ture of a 30 g aluminum cube, if its equilibrium temperature when placed in 90 g of room temperature (20 degree celsius) water was 25 degree celsius ?…

What is the initial temperature of a 30 g aluminum cube, if its equilibrium temperature when placed in 90 g of room temperature (20 degree celsius) water was 25 degree celsius ? (Caluminum=0.215 cal/g degree celsius). Please explain.