a train travel a distance in 6 hr having a constant speed of 40 km hr after than it. increase speed is moves with 45 km hr for next 3 hr. what is the 2average speed of train
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First time distance covered=6×40=240 km in 6 hrs
Next it covers distance=45×3=135 in 3 hrs
Total disi. covered =375 km in 9 hrs
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