Answer:
All the possible ways are below:
length
l = 12 m
width
w = 15 m
height
h = 21 m
diagonal
d = 28.460498941515 m
surface area
S = 1494 m2
volume
V = 3780 m3
length
l = 21 m
width
w = 15 m
height
h = 12 m
diagonal
d = 28.460498941515 m
surface area
S = 1494 m2
volume
V = 3780 m3
length
l = 15 m
width
w = 21 m
height
h = 12 m
diagonal
d = 28.460498941515 m
surface area
S = 1494 m2
volume
V = 3780 m3