A car runs at 50 km/h for 3 hours and then tracks at 70 km/h for the next 2 hours. Find the average speed across the whole route. MCQ with Answer and Explanation
Explanation:
Let total distance be 80 km. First part = 20 km; Time = 20 / 20 = 1 hour. Remaining part = 60 km; Time = 60 / 40 = 1.5 hours. Total distance = 80 km, Total time = 2.5 hours. Average speed = 80 / 2.5 = 32 km/h.
Two points A and B are 260 km apart. Train P leaves A for B at 50 km/h at 9:00 AM. Train Q leaves B for A at 60 km/h at 10:00 AM. At what time will they cross each other?
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