A diesel engine is operating at 1800 RPM and driving a propeller at 600 RPMWhat is the speed reduction ratio?（）<br>A:030 to 1<br>B:300 to 1<br>C:333 to 1<br>D:330 to 1

A diesel engine is operating at 1800 RPM and driving a propeller at 600 RPMWhat is the speed reduction ratio?（）
A:030 to 1
B:300 to 1
C:333 to 1
D:330 to 1

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