_The velocity ratio of the differential wheel and axle is$?

1.	_The velocity ratio of the differential wheel and axle is$?
A.	R/r1 - r2
B.	2R/r1
C.	3R/r1 - r2
D.	2R/r1 + r2
Answer» C. 3R/r1 - r2

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_The velocity ratio of the differential wheel and axle is$?

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