I'm new to this site. My boyfriend is unable to complete these problems due to a family emergency and I was going to try to help him because they are due in a few hours and his professor hasn't responded to his emails.
The problem is asking to find the volume of the solid generated by revolving the given region about the line y=6. The region is bounded by the curves $$ y=\frac 5x, \quad y=0, \quad x=1, \quad x=5 $$
I haven't done calculus in a long time and am having a hard time trying to solve this problem. I graphed out the lines given, but I'm unsure how to mathematically revolve this shape and which integral to use.