The pilot

The pilot is on a mission with 160 liters of fuel. The distance between the main base and operation area is 2 hours. The distance between the main base and backup base is 1 hour.
- Aircraft fuel consumption is 10 lt/h.
- Minimum fuel after landing should be not less than 43 lt.
- Climb fuel is 10 lt.
- Landing fuel is 2 lt.
For how long time can you continue on that mission?

Correct answer:

t =  7.5 h

Step-by-step explanation:

V0=16043102=105 l t0=10V0=10105=221=10.5 h t1=2 h t2=1 h  t=t0t1t2=221t1t2=10.521=215 h=7.5 h

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