Physics, 03.09.2019 19:30 tacaurus

Two trains of distance 100 km travelling towards each other at train a at 60 km/hr and train b at 40km/hr when a bird sitting on train a goes at a speed of 90km/hr starts moving towards train b from train a starts and comes back and forth. find the total distance travelled by the bird

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Two trains of distance 100 km travelling towards each other at train a at 60 km/hr and train b at 40...