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Can any one tell me what are the speaking topics for english second language 2017 in zone 3 asap
as physics help please guys
Please help me these question
A student, standing on the platform at a railway station, notices that the first two carriages of an arriving train pass her in 2.0s, and the next two in 2.4s. The train is decelerating uniformly. Each carriage is 20 m long. When the train stops, the student is opposite the last carriage. How many carriages are there in the train?