A body covers half of its journey with a speed of 60 m/s and the other – McqOptions

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1.	A body covers half of its journey with a speed of 60 m/s and the other half with a speed of 40 m/s. Then average speed during whole journey is
A.	0
B.	50 m/s
C.	48 m/s
D.	52 m/s
Answer» D. 52 m/s

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