At the time of the persecution of Christians in Rome many sought refuge in Iran and were given protection by the Iranian rulers. Though thousands of Persians embraced Christianity, Persia remained Zoroastrian with many adhering to the Cult of Mithra.
The average cost to refill a propane tank will depending upon the size of the tank, the geographical location, and the company doing the job. On average, a 10 pound tank is going to cost anywhere from $12 to $22 per tank. A 20-pound tank can cost upwards of $29 to $40 per tank to refill. A 100-pound tank can cost upwards of $65 to as much as $80 per tank. This is much cheaper per pound and will last a lot longer. Keep in mind that most stores will have a limit on the amount of propane that they can refill at any given time.
How Many Gallons in a 20 Pound Propane Tank? A 'full' 20 pound propane tank would contain 4.73 gallons of propane. Note that in some US tank exchange programs, the fill is something less than 20 pounds and is labelled accordingly. The image above is a typical 20 pound (9kg) propane tank.