## Task 1 - 020621

During the group flight of Soviet cosmonauts Nikolayev and Popovich, the spacecraft Vostok III and Vostok IV orbited the Earth once in about 88 minutes (approximately $41000 \mathrm{~km}$).

a) What distance did each spacecraft cover in one hour?

b) What distance did it cover in each second?

The results should be rounded sensibly!
a) The distance corresponds to $\frac{66}{80}$ of the Earth's circumference, i.e., $\frac{66}{80} \cdot 41000 \mathrm{~km} \approx 28000 \mathrm{~km}$.

b) 60 minutes consist of 3600 seconds, i.e., in one second, the spacecraft travels $\frac{41000}{3600} \mathrm{~km} \approx 7.8$ $\mathrm{km}$.