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The shaded region in the picture lies between the… | StemPy Lab
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The shaded region in the picture lies between the y-axis and the curve y = 2x², from y = 0 up to y = 8. It is turned about the y-axis to make a bowl, with the lengths in centimetres. What is the volume of the bowl?
Mathematics
Medium
High School (11–12)
Functions and Calculus › Application of Integrals
A-Level
AP
IB
Created by
StemPy Lab
The shaded region in the picture lies between the
y
y
y
-axis and the curve
y
=
2
x
2
y = 2x^2
y
=
2
x
2
, from
y
=
0
y = 0
y
=
0
up to
y
=
8
y = 8
y
=
8
. It is turned about the
y
y
y
-axis to make a bowl, with the lengths in centimetres. What is the volume of the bowl?
Fig. 1: A graph with the y-axis vertical. The curve y = 2x squared rises from the origin to the height 8 at x = 2. A dashed horizontal line marks y = 8. The region between the y-axis and the curve, from y = 0 to y = 8, is shaded light blue.
16
π
cm
3
16\pi\ \text{cm}^3
16
π
cm
3
π
cm
3
\pi\ \text{cm}^3
π
cm
3
128
π
5
cm
3
\dfrac{128\pi}{5}\ \text{cm}^3
5
128
π
cm
3
32
π
cm
3
32\pi\ \text{cm}^3
32
π
cm
3
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← The shaded region in the picture lies between the line y = 2x and the parabola y = x². A potter turns it about the x-axis to make a solid with a hollow inside, with x and y in centimetres. What is the volume of the solid?
The voltage across a sensor is f(t) = t² volts, where t is the time in seconds, for 1 ≤ t ≤ 4. A data logger reports the mean value of the voltage over these three seconds. What does it report? →
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