1. Understand the Formula:

Density (D) is calculated by dividing mass (M) by volume (V):

D = M / V

2. Convert Units:

* Mass: Leave the mass in grams (g).

* Volume: 125 cm * 3 = 375 cm³ (cubic centimeters)

3. Calculate Density:

D = 250 g / 375 cm³

D = 0.67 g/cm³

Therefore, the density of the object is 0.67 g/cm³.