# What is the relative speed of Gear A and Gear B?

+1 vote
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We have four gears with below features

=> Both Gear A and D has 60 teeth
=> Gear B has 40 teeth
=> Gear C has 20 teeth
=> Every two minutes, Gear B makes 25 full turns.

What is the relative speed of Gear A and Gear B?

posted Oct 23, 2015

2/3

1) 25*40=1000 teeth per 2 min
1000/60= 50/3 turns per 2 min
50/3/25=2/3 relative speed of Gear A vs Gear B
2) simply 40/60= 2/3

Two round of A is equal to three round of B.

answer Aug 7, 2020 by anonymous

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