The current San Francisco cable railway is driven by two large 16-foot-diameter drive wheels, called sheaves. Because of the figure-eight system used, the cable subtends a central angle of 270° on each sheave. Find the length of cable riding on one of the drive sheaves at any given time.
?
?
??a = 16
?
A. 38.7 feet
B. 35.7 feet
C. 40.7 feet
D. 37.7 feet
E. 33.7 feet
Answer: D
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