Asked by mashrika
jon and jony can do a piece of work alone 12days and 24days respectively.they were working together but after a few days jon went away.then jony can do the
rest work in 3days.how many days are needed to complete the whole work?
rest work in 3days.how many days are needed to complete the whole work?
Answers
Answered by
Scott
jon does 1/12 per day
jony does 1/24 per day
together they do 1/12 + 1/24 = 1/8 per day
it took jony 3 days to finish
... 3/24 = 1/8
so together, they did 7/8 ... in 7 days
7 + 3 = 10 days for completion
jony does 1/24 per day
together they do 1/12 + 1/24 = 1/8 per day
it took jony 3 days to finish
... 3/24 = 1/8
so together, they did 7/8 ... in 7 days
7 + 3 = 10 days for completion
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