find the volume of the solid genereated b revolving the triangular region bounded by the lines:
y = 2x , y = 0 , and x = 1 about
a. the line x = 1
b. the line x = 2
my problem is i understand how to use the disk method when u flip on the x or y axis.. but when u do it on x = 1 or x =2 for the flip, i dont know how to understand and approach it!