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Notes On Work And Time

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Published in: Mathematics
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Problems on work and time

Fatima J / Hyderabad

11 years of teaching experience

Qualification: M.Sc (vbs purvanchal university - 2017)

Teaches: Basic Computer, MS Office, School Level Computer, Computer Science, Mathematics, Physics, Statistics, Science, B.Sc Tuition, B.Tech Tuition

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  1. If Sita and Rita can do a job in 8 hours (working together at their respective constant rates) and Sita can do the job alone in 12 hours. In how many hours can Rita do the job alone? Sol: Let Rita does the work in R days and Sita does the work in S days. Let X be the number of days taken for the work if they work together. Then the formula would be + 1 IIS = I/X 1/12 + I/R = 1/8 8 R + 96 = 12R 96 = 4 R 24 = R Working alone, Rita can do the job in 24 hours. A person 'A' can do a job in 10 days. Another person 'B' can do the same job in 5 days. In how many days will they complete this job if they work together? Sol: Let A does the work in A days and B does the work in B days. Let X be the number of days taken for the work if they work together. Then the formula would be *1/10 + 1/5 = I/X
  2. 10/3= I/X •x=3.33days

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