Q. 4 - Calculus

Question

Sketching disks ,washers and shells : sketch the three disks , washers , shells that result from revolving the rectangles shown in the figure around the given lines 

The line $y=-1$

Step-by-Step Solution

Answer

The resulting solid from revolving around the y-axis will be washers .

Step 1. Given information

We have been given 

To find out the figure formed after revolving about y- axis .

Step 2. Finding the revolved figure

Since from the figure we can see that there is gap between the line $y=-1$and rectangles The resulting solid from revolving around the line $y=-1$ will be washers .