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Volume of revolution, region bounded by two functions

  • #1
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3

Homework Statement


Let R be the area in the xy-plane in the 1st quadrant which is bounded by the curves y^2+x^2 = 5, y = 2x and x = 0. (y-axis). Let T be the volume of revolution that appears when R is rotated around the Y axis. Find the volume of T.

Homework Equations




The Attempt at a Solution


This is the integral I have put up, using the cylindrical shell method:

int(x*(sqrt(5-x^2)-2x)*2pi)dx from 0 to 1. Is this the correct integral?
 

Answers and Replies

  • #2
mjc123
Science Advisor
Homework Helper
946
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Looks right to me.
 

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