Since 1 foot equals 12 inches, and the city receives 2 inches of snowfall every 6 hours, we can set up a proportion to solve for the time it takes to receive 1 foot (12 inches) of snowfall:
2 inches/6 hours = 12 inches/x hours
To solve for x, we can cross-multiply:
2 inches * x hours = 6 hours * 12 inches
2x = 72
x = 36
Therefore, it will take 36 hours for the city to receive 1 foot of snowfall at a rate of 2 inches every 6 hours.