Question

The volumetric efficiency of a certain engine is 88.2% of the theoretic airflow. If the actual airflow is 268.4 cFm (Cubic feet per minute), what is the theoretic airflow of this engine? (Round to the nearest 0.1 cm.)

Answer 1

Theoretic airflow: T

Actual airflow: A

$\begin{gathered} A=0.882\cdot T \\ \\ A=268.4\text{cFm} \\ \\ \text{Solve the equation for T:} \\ T=\frac{A}{0.882} \\ \\ T=\frac{268.4\text{cFm}}{0.882}\approx304.4\text{cFm} \end{gathered}$

Then, the theoretic airflow of the given engine is approximately 304.4 cFm