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Person A is completing job with 20 days and person B is completing same job with 30 days how many days will take if both of they r working 2 completing the same job? |
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Answer
25 days I'm guessing? Or is there a more complicated way of working out the riddle?
Answer
Person A does 1/20 of a job in a day. Person B does 1/30 of a job in a day. How many days x will it take to do 1 job.
1/20 x + 1/30 x =1
(30/600 + 20/600)x =1
(5/60)x =1
x=12 days
First answer by Love me lots. Last edit by Love me lots. Contributor trust: 40 [recommend contributor]. Question popularity: 8 [recommend question]
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