Im trying to find the axial area of the middle segment but I'm having trouble since the radius of the middle segment is increasing from 20 mm to 50 mm. I'm trying to find a way to find the radius but I just can't. My prof said to use integrals but I haven't gotten anywhere. Please help.

Question

anonymous · Answer

attachment

anonymous · Answer

I managed to get the rate of change for the radius but that's pretty much as far as I can go.

cwrw238 · Answer

m = 0.02 not 0.2

anonymous · Answer

woops yeah you are right. lol

anonymous · Answer

I'm trying to find the radius so I'm guessing I have to integrate the equation I got from 0 to 750 right?

cwrw238 · Answer

not sure what the axial area means

anonymous · Answer

Oops it's just the area of the figure from the bottom view.

anonymous · Answer

It's a cylinder

anonymous · Answer

but if I look from the bottom it looks like a circle XD

cwrw238 · Answer

so its the area of the circle at bottom of the cylinder

anonymous · Answer

not of the bottom but through the middle segment (the 750 mm segment)

cwrw238 · Answer

what do the  dotted lines represent?

cwrw238 · Answer

* dashed lines

anonymous · Answer

That means the the top segment is hollow with an outer diameter of 50 mm and an inner diameter of 30 mm.

anonymous · Answer

But I already figured out the area for that one 

A= pi/4 * (Do^2- Di^2 )

anonymous · Answer

ill post a new question

cwrw238 · Answer

sorry but i cant get my head around this one