As turbines are steady-state devices, the thermal efficiency of a turbine is equal to the percentage of the ratio of the output power to fluid power, that is:
The fluid power is:
Which means that gas turbine consumes 40 megajoules of fluid energy each second, which is heated and pressurized with help of the fuel, whose amount of consumption per second is:
Answer: You're question is very vague... be more specific in the problem, what is it asking you to do?
Explanation: This shouldn't be under "Engineering" you should put it under "Mathematics" for a better result. Sorry for the mix up! Hope this helps! ^^