Two spanners X and Y of lengths 15cm and 20cm respectivel...
Two spanners X and Y of lengths 15cm and 20cm respectively are used in turn to give a screw of pitch 2mm one complete rotation. If Rx and Ry are the respective velocity ratios of the spanners then the ratio Rx : Ry is
1 : 50
3 : 20
3:4
4:3
20:3
Correct answer is C
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