If crankshaft in twin cylinder four stroke engine is turning at 1000 rpm how fast is camshaft turning?

In a twin-cylinder four-stroke engine, the crankshaft completes one full rotation for every two strokes of the pistons. Since the crankshaft is turning at 1000 RPM, the camshaft, which is typically driven by the crankshaft at half that speed, will turn at 500 RPM. Thus, the camshaft in this engine will be rotating at 500 RPM.