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Math Calculus — AID—

A plane flies between two cities. The plane leaves Paris at 08:50, flies to Glasgow and returns to Paris arriving at 13:05 The time spent in Glasgow is 45 minutes. The second flight is 10 minutes longer than the first flight. What is the arrival time in Glasgow of the first flight?
A

Total time spent: 4 hours 15 minutes (it is equivalent to 255 minutes). Let the flight time from Paris to Glasgow be X. Then the flight time from Glasgow to Paris will be (X+10).
We have an equation with one unknown variable:
X + 45 + (X+10) = 255 ⇒ X = 100
So the flight time from Paris to Glasgow is 100 minutes. If the plane leaves Paris at 08:50 then it will be in Glasgow at 10:30.

Answer: 10:30

4 months ago
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