On my flight to Recife, to receive the gold medal I won in the OBMEP, the following information appeared on the cabin passenger screen:

Average speed: $864 \mathrm{~km} / \mathrm{h}$

Distance from the departure location: $1222 \mathrm{~km}$

Time of arrival in Recife: 1 h $20 \mathrm{~min}$

If the plane maintained the same speed, then what is the approximate distance from Recife to the city where I boarded this flight?
(a) $2300 \mathrm{~km}$
(b) $2400 \mathrm{~km}$
(c) $2500 \mathrm{~km}$
(d) $2600 \mathrm{~km}$
(e) $2700 \mathrm{~km}$
At the moment the information was given, the remaining flight time was $1 \text{ h } 20 \text{ min}$, or $4/3 \text{ h}$. Therefore, at this moment, the distance to Recife was $864 \times \frac{4}{3} = 1152 \text{ km}$. Since we were $1222 \text{ km}$ from the city of departure, the distance between this city and Recife is $1152 + 1222 = 2374 \text{ km}$. Among the options, the closest one is $2400 \text{ km}$, which is option (b).