A parabola x = y2 with 0 ≤ x ≤ 1 is shown in the figure. The volume of the solid of rotation obtained by rotating the shaded area by 360° around the x–axis is
Correct Answer :
π/2
Solution :
The correct option is π/2.
To find the volume of the solid of rotation obtained by rotating the shaded area 360° around the x-axis, we use the disk method.
The boundary curve is given by the parabola equation:
for the interval:
The formula for the volume of a solid rotated about the x-axis is given by:
Here, the limits of integration along the x-axis are from to , as visible in the provided figure. Substituting these limits and the relation into the volume formula, we get:
Now, we integrate with respect to :
Evaluating the expression by substituting the upper limit 1 and the lower limit 0:
Therefore, the volume of the solid of rotation is .
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