A 420 m long train crosses a pole in 70s. What is the speed of the

1.	A 420 m long train crosses a pole in 70s. What is the speed of the train?
A.	8 m/s
B.	4 m/s
C.	6 m/s
D.	2 m/s
Answer» E.

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A 420 m long train crosses a pole in 70s. What is the speed of the train?

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