Hi, I need some help with this Geometry/trigonometry question :)

[sarah.alt]

I have no clue where to start or how to solve this

 

[Deleted member 4993]

I have no clue where to start or how to solve this

The cross-sectional area of a hollow cylinder with outer radius (r_o) and inner wall (r_i) can be expressed as:

A = \(\displaystyle \pi * (r_o^2 - r_i^2) \)

continue......

Please show us what you have tried and exactly where you are stuck.

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Please share your work/thoughts about this problem.

 

[Dr.Peterson]

I have no clue where to start or how to solve this

The area formula comes from subtracting the area of the inner circle from the area of the outer circle.

Part (b) asks you to apply the formula; part (c) asks you to solve for x.

That's where to start. Please let us know what additional help you need.