7.7 Volume Washer Methodap Calculus   7.7 Volume Washer Methodap Calculus Solver

Problem with setting up Washer/Disk method for determining solid of revolution.
Need to find the volume of the solid of revolution:
Find the volume of the solid of revolution generated by revolving region about the line y=7
y=7sqrtx, y=7 and x=0
I set up the problem like this:
a=0 b=1 pi[7^2 - (7sqrtx)^2 dx] using the washer method
The answer to this problem is 49pi/6 in my book.
I got 49pi/2.
How am I setting up the problem wrong? These are difficult problems, and getting an answer does not help with the learning.

7.7 Volume Washer Methodap Calculus Problems 7.7 Volume Washer Method Ap Calculus Frq

5,023 3 3 gold badges 7 7 silver badges 23 23 bronze. Calculus volume problem. Use calculus to set up an integral for the volume of the bagel using washer. Calculus Name Date Period ©X Q2b0 51E32 JKSu hteaP uSpoLfmt3w Za crOeO cL eLZCh.E i rAalolG QrOizg thKt4s 4 Crpe Es 1e nr Xvhe qdk. 2 7.3: Disk and Washer Method for Volumes For each problem, find the volume of the solid that results when the region enclosed by the curves is.