SOLUTION: One person can do a certain job in 15 minutes, and another person can do the same job in 30 minutes. How many minutes will it take them to do the job together?
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Question 479987: One person can do a certain job in 15 minutes, and another person can do the same job in 30 minutes. How many minutes will it take them to do the job together? Answer by Maths68(1474) (Show Source):
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‘A’ can do the job = 1/15 Job/minutes
‘B’ can do the same job = 1/30 Job/minutes
Both ‘A’ & ‘B’ can do the Job = 1/15+1/30
=(2+1)/30
=3/30=1/10 job/minutes
Both A & B can do the Job in 10 minutes
