Answer:
total volume = 225m^3
Step-by-step explanation:
try to cut it as 2 rectangular shape, bigger one with 6cm x 6cm, smaller one with 3cm x 3cm
volume 1 = 6 x 6 x 5 = 180m^3
volume 2 = 3 x 3 x 5 = 45m^3
