An eagle is flying between two trains, each travelling towards each other on the same track at 80 km/h. The eagle reaches one engine, reverses itself immediately, and flies back to the other engine, repeating the process each time. The eagle is flying at 50 km/h. If the eagle flies 150 km before the trains meet, how far apart were the trains initially?
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The eagle is flying at the speed of 50 km/h and covers 150 km. Hence, the eagle flies for 3 hours after trains started. It's obvious that trains met 3 hours after they started travelling towards each other. Also, trains were travelling at the speed of 80 km/h. So, each train traveled 240 km before they met. Hence, the trains were 480 km apart initially.
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