Tutorial Exercise Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the x axis Verify your results using the integration capabilities of a graphing utility y cos 5x y 0 X 0 X K 10 Step 1 To find the volume of a solid of revolution about the x axis use the horizontal By the washer method 7 10 The representative rectangle is shown in the figure The outer and inner radii of the solid are R x cos 5 x Cb axis of revolution X and r x 0 respectively