A region is enclosed by curves
x^2 =4y, x^2 =−4y, x=4 & x=−4
V_1 is the volume of the solid obtained
by rotating the above region round
the y−axis. Another regions
consists of points (x,y) satisfying
x^2 +y^2 ≤16, x^2 +(y−2)^2 ≥4 and
x^2 +(y+2)^2 ≥4 ,V_2 is the volume
of the solid obtained by rotating
this region round the y−axis
Then V_1 =...
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