A train start from station A and moves with constant acceleration, then with constant speed and finally with constant retardation. If the ratio of time taken are 1: 6: 2 and maximum speed of train is 72 km/h. Then the average speed for the whole journey is –
Text Solution
Verified by ExpertsThe correct answer is:
A
Displacement of train = Area of trapezium
= 
× (9t + 6t) × 72
= 
= 
= 60 km/h
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