Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer.

y=x, y=0, x=2, and x=4; about x=1

I have nooo idea how to do this, the answers at the back of the textbook has 2 washers drawn, one at the top and the other at the bottom. I find this really complicated and I'm desperate for help :(

Question

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer.

y=x, y=0, x=2, and x=4; about x=1

I have nooo idea how to do this, the answers at the back of the textbook has 2 washers drawn, one at the top and the other at the bottom. I find this really complicated and I'm desperate for help :(

anonymous · Answer

yes
but i need the calculation

anonymous · Answer

yes

anonymous · Answer

calculation now please

anonymous · Answer

could show that please

anonymous · Answer

could u show me that, how to do it please

anonymous · Answer

kk and i have test tomorrow so i want know how to do it please 
thanks soo much

anonymous · Answer

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callisto · Answer

And the line in which it rotates about?

e.mccormick · Answer

A reference I have found a bit easier to digest than most Calculus books: http://tutorial.math.lamar.edu/Classes/CalcI/VolumeWithRings.aspx

anonymous · Answer

can u help me with calculation

callisto · Answer

You need one more line before going into the calculation.

callisto · Answer

And that line is x=1

anonymous · Answer

can u show to me then

callisto · Answer

It rotates about this line:
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