Eight in one row, 16 if you made two rows.
It depends how thick the pallets are.
22
Pallets can come in different sizes.
That of course will depend on the dimensions of each pallet which has not been given.
30 (two rows of 15 if the fork entry is on the 48 inch side and two 48 inch pallets can fit next to each other in the trailer).or26 (two rows of 13 if the fork entry is on the 40 inch side).The above assumes one layer of pallets (no stacking).
It depends how thick the pallets are.
10
A 48 foot trailer can hold about 24 standard pallets. Each pallet is 4 feet by 4 feet, and the trailer is about 8 feet wide.
27 pallets
28
22
26 standard size pallets
Standard pallets are 4 feet so single file would be 12. If you put them side by side which is common 24.
22
Pallets are 40''X48" or 4 feet long. 5 pallets equals 20 feet. 2 wide in a container is 10 pallets.
20
24