A is half good a work man as B and together they finish a job in 20 days. In how many days working alone B finish the job?	Answers:
A) 98 days B) 30 days C) 17 days D) 18 days E) 19 days
WC = 1:2   2x + x = 1/20 =&gt; x = 1/60   2x = 1/60 =&gt; 30 days   Answer:30 days
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A is half good a work man as B and together they finish a job in 20 days. In how many days working alone B finish the job?