(Refer to CAP 697 - figure 2.1)
Given:
Takeoff pressure altitude: 4623 ft
Takeoff OAT: -15° C
Cruise pressure altitude: 9500 ft
Cruise OAT: -25° C
Initial weight: 3200 lbs
Determine the time and fuel to climb:

4 minutes; 1 gallon
4.5 minutes; 1.5 gallons
3 minutes; 1.5 gallons
5 minutes; 2 gallons