Mathematics 9709 · AS & A Level · Integration

Integration — practice question

The diagram depicts a portion of the curve with equation $y = x^2 + 1$. The shaded area enclosed by the curve, the $y$-axis and the line $y = 5$ is rotated through $360^\circ$ about the $y$-axis.
(main)[4]

Calculate the volume obtained.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: Sets up the integral $(\pi)\int (y-1)\,dy$ or a matching equivalent

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