Since the snowfall started at 4 pm and stopped at 8 am.
Total duration of snowfall = (4 pm to 4 am) +( 4 am to 8 am)
= 12 hours + 4 hours
= 16 hours.
Length of snow = 2 feet
Since, 1 feet = 12 inches
2 feet = 24 inches.
So, we have to find the rate of snowfall in inches per hour.
Rate of snowfall in inches per hour =

= 1.5 inches per hour.
So, the rate of snowfall in inches per hour is 1.5