Çözüldü Arc Length in Circle - Direct Proportion

From Mathematics Diagnostic Placement Test (MDPT) at California State Polytechnic University, Pomona:

https://i.ibb.co/dDpp0v2/Arclength.png
https://www.cpp.edu/lrc/documents/test-preparation-docs/mdpt/Math-Analysis-Practice-Test-1.pdf
(Page 4, Question 24)

2π radians -------------> 2π·60 feet arc length
π / 6 radians -----------> x feet arc length

2π·x = (π / 6)·2π·60
x = 10π feet.

Solution directly through the related formula:

https://i.ibb.co/LZ4GtFh/Arclength-sol.png
https://www.cpp.edu/lrc/documents/test-preparation-docs/mdpt/Math-Analysis-Test-1.pdf
(Page 6)