Home » GMAT » How many teeth did the gear move assuming the each radian is approximately 60 degrees?
On a mechanical gear, 6 teeth represent a movement of 1.2 radians. The gear is connected to a wheel that moves twice as much. If the wheel moved 276 degrees how many teeth did the gear move assuming the each radian is approximately 60 degrees?
A. 11.5
B. 14.2
C. 28.3
D. 34.7
E. 41.3
Correct Answer: A
Explanation/Reference:
Explanation:
The wheel moved 276 degrees the gear moved 138 degrees / 60 = 2.3 radians. 1.2 radians are 6 teeth one radian is 5 teeth’s. 2.3 x 5 = 11.5 teeth movement.
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