Asked by alex
it takes janet 9 hours to do a task and it take jancie 10 hours to do the same task how long will it take both of them to do the task together
Answers
Answered by
bobpursley
janet rate: 1task/9hrs
jancie rate: 1task/10hrs
combinded rate=1task/hr (1/9+1/10)
timecombined=1task/combinded rate
careful with the fractions.
jancie rate: 1task/10hrs
combinded rate=1task/hr (1/9+1/10)
timecombined=1task/combinded rate
careful with the fractions.
Answered by
da
5 hrs
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