A train started at 9.00 a.m. from station X with a speed of 72 km/h. after two hours, another train started from station Y towards X with a speed 90 km/h. the two trains are expected to cross each other at 1.30 p.m. owing to a signal problem arising at 12 noon, the speed of each of them was reduced by the same quantity and they crossed each other at 4.30 pm. What is the new speed of the train that started from station X?.
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Answer:60 seconds
Step-by-step explanation:
et length of trains be Lm Speed of train P = 5sec to cross pole Speed of train Q= 6sec to cross pole Trainsaross each other so distance travelled =length of P + length ofQ L+L Time taken= Relative speed Time takon=D1stance travelled -Subtraction ofspeeds is done as trains go in same diredion 30x2 Time Taken = 60 seconds
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