11. Suppose 3,500 gallons of gasoline spill into a banked up area that measures circular area that is 10ft in diameter. If the fuel’s vertical burning rate is 6 in/hour, how long will the fire last if it is left unattended?

1 answer

1 gallon = 231 in^3.
The fuel depth in the spill is volume/area:
3500*231/2500π = 102.94 in
so, at 6 in/hr, it will burn for
102.94/6 = 17.157 hours