問功課 "A (man or woman)'s WORK CAPACITY"應該係 (1) Days per man or woman, i.e., man=15 days, woman=16 days，所以答案係15:16 定係 (2) =Work rate? i.e., man=1/240, woman=1/320，所以答案係4:3 認真求指教，呢啲做題還返曬畀中小學⋯⋯ T_T