I\'m trying to calculate the radial distance between B and C. My problem is that

Question

I'm trying to calculate the radial distance between B and C. My problem is that I don't understand why the angle of the section BC (in degrees) is 30.

Shouldn't it be 60 degrees? A draw will be great help...

I figured out that it was 30 because it's solved in the following link:

http://www.chegg.com/homework-help/questions-and-answers/car-reaches-point-speed-25-m-s-breaks-applied-speed-reduced-1-4t-1-2-m-s-2-determine-magni-q1500849

I'm trying to calculate the radial distance between B and C. My problem is that I don't understand why the angle of the section BC (in degrees) is 30. Shouldn't it be 60 degrees? A draw will be great help... I figured out that it was 30 because it's solved in the following link:

Explanation / Answer

why do you worry about the angle, its just the question has provided you with the data

and if you want to find the radial distance then just,

arc = angle*radius

you are provided with both angle and radius (just convert the angle in radians)

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