Which African city was the first to have a metro system?

The Cairo Metro is the rapid transit system in Greater Cairo, Egypt. It was the first of only two full-fledged metro systems in Africa, the other being in Algiers, and only four in the Arab world. It was opened in 1987 as Line 1 from Helwan to Ramsis square with a length of 29 kilometres (18.0 mi). As of 2014, the Cairo Metro has 61 stations (mostly At-grade), of which 3 are transfer stations, with a total length of 77.9 kilometres (48.4 mi). The system consists of three operational lines numbered from 1 to 3. During 2013, the metro carried nearly 4 million passengers per day.

The Cairo Metro is run by the National Authority for Tunnels. The lines use standard gauge (1,435 mm (4 ft 81⁄2 in)).