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## 7.2A Volumes by Revolution: Disk/Washer Method

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**Ex 1 Find the volume of the solid obtained by rotating the**region under the curve about the x-axis from 0 to 1.**Ex 2 Find the volume of the solid obtained by rotating the**region enclosed by the curves y = x2 & y = x about a)y –axis b)y = 2.**Disk:**• Washer:**Ex Find the volume of the solid obtained by rotating about**the y-axis the region bounded by y = 2x2x3 and y = 0.