Math 141 (Calculus I) covered Sections 6.1 (area) and 6.2 (volume by Disk/Washer Method).

Math 142 (Calculus II) covers Section 6.3 (volume by Shells Method).

For §6.3, you must remember §6.1 and ideas for § 6.2 are useful.

In case you need to review these concepts, I've provided below a suggested review of § 6.1 & 6.2.

The below posted Chapter 6 Review Formula Quiz (and solutions) is a great resource.

section	handouts	note to yourself the date assigned	problems
Math 141 material
6.1 area btw 2 curves	lecture	not covered in Math 142	1, 3, 5, 7, 11, 13, 15, 19, 21, 23, 27, 29, 31, 49, 51. For 1-31, express the area as integral(s) but no need to evaluate the integral(s). The determining factor on whether to integrate w.r.t. x or y is the ease of setting up the resulting integral(s). Sometimes one way is easy and the other way is hard (pick the easy way). Sometimes both ways are easy (doesn't matter). Sometimes both ways are hard (doesn't matter). Give the problems a serious shot before looking at these hints.
6.2 volume by disk/washer	lecture	not covered in Math 142	1, 5, 7, 9, 11, 17, 19-30, 31, 33, 35, 41, 43, 50, 51, 63. For 1 - 35, express the volume as integral(s) but no need to evaluate the integrals. Give the problems a serious shot before looking at these hints.
Math 142 material
6.2 & 6.3 Volume of Solids of Revolution	summary
6.3 volume by shells	lecture		3, 5, 7, 9, 11, 13, 15, 17, 19, 23, 29-32. For 1 - 23, express the volume as integral(s) but no need to evaluate the integrals. Give the problems a serious shot before looking at these hints.
Math 142 Chapter 6 Review
6.2 & 6.3 Volume of Solids of Revolution	a review		§ 6.3:   37 - 43 (all) For 37-43, express the volume as integral(s) but no need to evaluate the integrals. Give the problems a serious shot before looking at these hints.
6.2 & 6.3 Volume of Solids of Revolution	a review		Some nice problems (with sol'n) from another textbook.
Chapter 6 Review			Be able to complete this Formula Quiz perfectly on the Exam over Sections 6.2 and 6.3. Formula Quiz Formula Quiz Solutions
Chapter 6 Review from my previous exams			F is Fall.   S is for Spring. 13S, Exam 3: 0B, 7-11 12F, Exam 3 - practice: 0B, 6-10 12F, Exam 3: 0B, 8-14 11F, Exam 3 - in class: 3abcd 10S, Exam 3 - in class: all 09F, Exam 3: 1, 2, 7abcd, 10 08F, Exam 3: 1, 2, 7abcd, 10 06F, Exam 1: 2, 3abcd 06S, Exam 1: 2abc, 3abc 05F, Exam 1: 6, 7, 8, 10