Question

一项挖土工程,如果甲单独做需三十六天完成,乙需四十五天完成

Answer 1

1/36+1/45=5/180+4/180=1/20

1/20*(1+20%)=1/20*6/5=3/50

3/5/(3/50)=10

18-10=8

2/5/8=1/20

3/50-1/20=6/100-5/100=1/100

50/(1/100)=5000