document.write( "Question 273632: If a 72-candela light source is located at a distance of 3 meters from a surface, the illuminance on the surface is \n" );
document.write( "A. 8 lux. \n" );
document.write( "B. 24 lux. \n" );
document.write( "C. 216 lux. \n" );
document.write( "D. 648 lux. \n" );
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