Chapter 3, Problem 11RQ

Which of the following is the correct formula used to calculate engine displacement?

Displacement = $\pi \times R^2\times L\times N$

Displacement = ${\pi }^2\times R\times L\times N$

Displacement = $\pi \times D\times L\times N$

Displacement = $\pi \times D\times L^2\times N$