Loaded, you'd be looking at between five and seven miles per gallon.
Four to nine MPG, depending on a number of factors. It's pretty much the same with any tractor trailer.
Depending on the make, the average length of a tractor is 22 feet. A standard trailer is 53 feet. The combined average length of the vehicle is 70 feet.
About £200
3-6 mpg
Around $60,000, and unless you work for a company you can't buy a separate trailer. $135,000 for a fullsize tractor, $72,000 for a reefer trailer.
The average tractor trailer holds almost 300 gallons of gas! I am unsure of if you were speaking of a tractor trailer or a tractor for cutting the lawn.
$10,000 a year
Bigger than average
The average length of a standard tractor trailer is 70 feet in all, the trailer itself being 53 feet in length. Most flatbed trailers are 48 feet long.
Most of the newer trucks average around 6 mpg. My 1984 International Cabover with a 300hp BC3 got 5.5 mpg and my 1985 Freightliner Cabover with a 3406 310hp caterpillar got closer to 6 mpg. My 1996 Peterbilt 377 got a lifetime average of 7.3 mpg with a S60 Detroit 500 hp.
Whatever the company pays.
It can be anywhere form 75-250