Answer :
Verify each options
we have that
the base is 108 m2
so
6,18,54 could be
check
base=6x18=108 m2 is ok
but
the face of 18 m2 is not possible
check
2,9,12
9x12=108----> is ok
2x9=18 ----> is ok
2x12=24 ----> is ok
Verify each options
we have that
the base is 108 m2
so
6,18,54 could be
check
base=6x18=108 m2 is ok
but
the face of 18 m2 is not possible
check
2,9,12
9x12=108----> is ok
2x9=18 ----> is ok
2x12=24 ----> is ok