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| Height | Volume |
| 1 | 10 |
| 2 | 80 |
| 3 | 270 |
A circle has centre O and angle POR = angle QOR. Construct tangents at P and Q meeting at T. Draw a circle with diameter OT. Do P and Q lie inside, or on, or outside this circle?
What is the volume of the solid formed by rotating this right angled triangle about the hypotenuse?