Need math help please
2 answers:
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Hi there!
Say h = hours spent. We know Rachel finishes the job in 5 hours, thus, she finishes of the job in one hour. We also know Carl finishes the job in 8 hours, thus, he finishes
of the job in one hour. Working together, this would equal:
Now, this is the rate per hour. Thus, multiply this by h to get how much of the work is done in terms of hours spent, and set it to 1 to find how many hours it would take to finish 100% of the job.
Thus, it will take them approximately 3.0769 hours, or approximately 3 hours 4.614 minutes to finish the job together.