Two buses X and Y leave from the same place and go in the same direction at speeds of 20 kmph and 50 kmph respectively. But, Y leaves 6 hours after X has left. How far from the starting place will the buses meet?

Show answer & explanation

Answer: (B) 200 km

Explanation

In 6 hours X covers 120 km. Y gains 50 − 20 = 30 km/h, so it catches up in 4 hours, having travelled 50 × 4 = 200 km.