To measure the fuel consumption of an experimental lawn mower, fuel is drawn from a tank...

To measure the fuel consumption of an experimental lawn mower, fuel is drawn from a tank that is resting on a scale, as shown in the figure. The tank and the fuel have an initial total mass of 10 kg. If the mass scale shows a value of 9.45 kg after 30 minutes, what is the fuel consumption of the lawn mower in gallons per hour?