Question
A single-engine airplane carries enough fuel for an 8-hour flight. After the airplane has been flying for 1 h, the fuel tank begins to leak at a rate that would empty the tank in 12 h. How long after the leak begins does the plane have until it runs out of fuel?
Answers
The rest of the fuel can last 7 hours in flight, and will leak in 12 hours.
So each hour, the plane uses 1/7th of what's left, and leaks 1/12th of what's left, for a total of 19/84th of what's left.
It will therefore last 84/19 hours.
So each hour, the plane uses 1/7th of what's left, and leaks 1/12th of what's left, for a total of 19/84th of what's left.
It will therefore last 84/19 hours.
Related Questions
An airplane of mass 1.5x10^4kg is moving at 60m/s. The pilot then revs up the engine so that the for...
On each flight an airplane is filled with 10 quart of oil for each planned hour of flying write an e...
An airplane is flying on a flight path that will take it directly over a radar tracking station. The...