A 280 m long train crosses a platform thrice its length in 6 min 40 se – McqOptions

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1.	A 280 m long train crosses a platform thrice its length in 6 min 40 sec. What is the speed of these train?
A.	3.2 मी./से.
B.	21.63 मी./से.
C.	2.8 मी./से.
D.	none of these
Answer» D. none of these

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