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1. |
The diameters of the fore wheel and the rear wheel of a tractor are in the ratio 1: 4. When the fore wheel makes 100 revolutions per minute, how many revolutions per minute would the rear wheel make ? |
A. | 18 |
B. | 23 |
C. | 25 |
D. | 17 |
Answer» D. 17 | |