SOLUTION: Jack mows his yard in 3hrs and Marilyn mows the same yard in 5. How much time would it take for them to mow it together?

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Question 357529: Jack mows his yard in 3hrs and Marilyn mows the same yard in 5. How much time would it take for them to mow it together?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

Let x represent the time to mow it together

%281%2F3%29+%2B+%281%2F5%29+=+%281%2Fx%29

Multiplying thru with 15x to clear the denminators

5x + 3x = 15

8x = 15

x = 1.875hrs