9.4: Finding Volume using Washer Method

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Presentation transcript:

9.4: Finding Volume using Washer Method

Find the region bounded by and y=x. Warm-up Find the region bounded by and y=x.

The idea in the washer method of finding volume Find the volume of the larger one, then the volume of the smaller one and subtract it off.

Simplifying the idea of the disk method Large Volume Small Volume R = function furthest from the axis of rotation r = function closest to axis of rotation

Find the volume of the solid that results when , x=4 and y=0 are revolved about the y-axis.