what are the lengths of the lines?
20.6 km (12.8 mi), 8.9 km (5.5 mi), 17.5 km (10.9 mi), 6.0 km (3.7 mi), 21.4 km (13.3 mi), 20.4 km (12.7 mi), 15.2 km (9.4 mi), 1.4 km (0.87 mi), 19.1 km (11.9 mi), 18.3 km (11.4 mi), 2.3 km (1.4 mi), 0.8 km (0.50 mi)
of those lines, which is the longest?
21.4 km (13.3 mi)
what is the name of the longest line?
meitetsu inuyama line