A train takes 50s to cover 500 m. Its speed in km/h is:

1.	A train takes 50s to cover 500 m. Its speed in km/h is:
A.	12 km/h
B.	20 km/h
C.	36 km/h
D.	45/2 km/h
Answer» D. 45/2 km/h

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A train takes 50s to cover 500 m. Its speed in km/h is:

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