The first number would be 3×5=15.
Another number could have different values. it could be
4=2×2
12=2×2×3
20=2×2×5
60=2×2×3×5
Hello Archanavrane75p56yu7
The answer to this problem would be 9 days for the second warehouse if 1.5 times than the first one.
:)
P.S (Dont cry)