Answer:
31 m
Step-by-step explanation:
v=l*w*h since it is a cube then all sides (a) are equal:
v=(a*a*a)=a^3
v1+v2=1331 for the first two boxes(
a³+a³=∛1331
l=w=h=11*2=22
v=729 ( for the second cube)
a=∛729=9
9+22=31 m
