Answer :
The amount of fuel the jet would consume on a 700 km mission is calculated to be fuel burning rate × 20 L
As we have to determine the amount of fuel the jet consumes on a 700 km mission and the speed of the jet is given to 2100 km/h, we first determine the time taken to complete the mission as follows;
T = altitude / speed
T = (700 km / 2100 km/h)
T = 0.333 hours
As 1 hour = 60 minutes, therefore;
T = 0.333 hours × 60 = 20 minutes
Therefore the fuel consumed can be given by the following expression;
Fuel required for mission = fuel burning rate × 20
The rate of fuel burning is given to be 78.7/L.min
For one minute the fuel needed = 78.7 L
For 20 mins fuel needed = 78.7 × 20 L
Fuel required for mission = 78.7 × 20 L = 1574L
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