A person travels between two towns. At 60 km/h, he arrives 1.5 hours early. At 40 km/h, he arrives 1 hour late. What is the distance between the towns?

उत्तर देखें और व्याख्या

उत्तर: (A) 300 km

व्याख्या

d/40 − d/60 = 2.5 gives d/120 = 2.5, d = 300 km.