Question: Each piston of an engine makes a sharp sound every other revolution of the engine. (a) How fast (in km/hr) is a race car going

Each piston of an engine makes a sharp sound every other revolution of the engine.

(a) How fast (in km/hr) is a race car going if its eight-cylinder engine emits a sound of frequency 703 Hz, given that the engine makes 2122 revolutions per kilometer?

km/hr

(b) At how many revolutions per minute is the engine rotating?

rev/min

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