Question 1142675: A barber pole consists of a cylinder of radius 10cm on which one is red, one white, and one blue helix, each of width are painted. The cylinder is 1m high. If each stripe makes a constant angle of 60 degrees with the vertical axis of the cylinder, how much surface area is covered by the red stripe?
Answer by ikleyn(52898)   (Show Source):
You can put this solution on YOUR website! .
A barber pole consists of a cylinder of radius 10cm on which one is red, one white, and one blue helix,
each of width are painted. The cylinder is 1m high. If each stripe makes a constant angle of 60 degrees
with the vertical axis of the cylinder, how much surface area is covered by the red stripe?
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The major feature of this problem is that the strips have EQUAL WIDTH.
It is not said DIRECTLY, CLEARLY, EXPLICITLY and in a BOLD manner, but otherwise the problem can not be solved.
Next, the major idea of the solution is that each strip area is exactly ONE THIRD of the total lateral surface area of the cylinder.
Now, a good style requires me TO STOP at this point, leaving the rest of the solution to you.
Have a fun (!) Happy calculations (!)
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