OCR MEI C4 — Question 6

Exam BoardOCR MEI
ModuleC4 (Core Mathematics 4)
TopicVolumes of Revolution

6 Fig. 3 shows the curve \(y = \ln x\) and part of the line \(y = 2\). \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{8d786d33-c5c2-44a6-8273-7a3e43e552ef-4_244_548_1346_768} \captionsetup{labelformat=empty} \caption{Fig. 3}
\end{figure} The shaded region is rotated through \(360 ^ { \circ }\) about the \(y\)-axis.
  1. Show that the volume of the solid of revolution formed is given by \(\int _ { 0 } ^ { 2 } \pi \mathrm { e } ^ { 2 y } \mathrm {~d} y\).
  2. Evaluate this, leaving your answer in an exact form.