Tsotsoma flew from Johannesburg to Paris, France. He departed from Johannesburg at 10:00 on 26 June 2021. He arrived in Paris at 20:00 on 26 June 2021. Calculate his flying time from Johannesburg to Paris. NOTE Paris practices DST.

Tsotsoma departed from Johannesburg at 10:00 on 26 June 2021.
Tsotsoma arrived in Paris at 20:00 on 26 June 2021.

Johannesburg observes South African Standard Time (SAST), which is UTC+2.
Paris observes Central European Time (CET), which is UTC+1. However, the problem states that Paris practices DST. On 26 June 2021, Paris would be observing Central European Summer Time (CEST), which is UTC+2.
Since both Johannesburg (SAST) and Paris (CEST) are UTC+2 on this date, there is no time difference between the two cities.

Since there is no time difference between Johannesburg and Paris on this specific date, the flying time can be calculated by directly subtracting the departure time from the arrival time.

The flying time from Johannesburg to Paris is 10 hours.