(Refer to CAP 697 - figure 2.2.3)
Planning a flight for a SEP1 from Perth (PTH) to Jersey (JSY). Climb from 1000 ft overhead Perth to FL 110 and cruise at this FL to overhead Jersey. Use a TAS of 120 kts for the climb. Cruise at the recommended power settings of 23.0 inches HG at 2300 RPM. Your take-off weight is 3400 lbs and fuel in tanks at take-off is 400 lbs. Your destination alternate aerodrome is Guernsey. Assume a level cruise from overhead Jersey to overhead Guernsey for the diversion at FL60.
On line 7 the fuel used is:
12.7 lbs
13.6 lbs
10.5 lbs
11.7 lbs