A car from a to B, the first three hours of 180 kilometers, according to this speed, but also 1.5 hours to reach, AB how far away?

A car from a to B, the first three hours of 180 kilometers, according to this speed, but also 1.5 hours to reach, AB how far away?

180 △ 3 = 60 (km) 60 × (3 + 1.5) = 60 × 4.5 = 270 (km) a: AB is 270 km away