Answer :
mass of a cube = density * volume
volume = length of each side ^3
= 7.5*7.5*7.5 = 521.875 cm ^3
therefore mass = 8.90 g/cm3 *521.875 cm3 = 3754.69
volume = length of each side ^3
= 7.5*7.5*7.5 = 521.875 cm ^3
therefore mass = 8.90 g/cm3 *521.875 cm3 = 3754.69