## Task 1 - V10911

The new turboprop aircraft of Lufthansa, type IL 18, takes off from Berlin-Schönefeld at 8:05 AM and lands in Moscow at 13:00 PM. The return flight starts at 14:55 and ends at 16:10 (note: 12:00 PM Central European Time corresponds to 14:00 PM Moscow Time).

a) What is the average speed of the IL 18 on the outbound and return flights?

b) What is the average wind speed, assuming the aircraft flew with the wind on the outbound flight and against the wind on the return flight?

The flight distance is $1630 \mathrm{~km}$.
Calculation of flight times: $2 \frac{11}{12}$ or $2 \frac{1}{4}$ h.

Calculation of flight speeds: $559 \text{ or } 502 \text{ km} \cdot \text{h}^{-1}$.

The wind speed is thus approximately $28.5 \text{ km} \cdot \text{h}^{-1}$.