SOLUTION: a farmer can plow a certain field three times as fast as his son. working together it will take them 6 hours to plow the field. how long would it take for his son to plow the field

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Question 642858: a farmer can plow a certain field three times as fast as his son. working together it will take them 6 hours to plow the field. how long would it take for his son to plow the field alone?
Answer by htmentor(1343) About Me  (Show Source):
You can put this solution on YOUR website!
The son can plow x fields per hr
The father can plow 3x fields per hr
Working together, they can plow x + 3x = 1/6 fields/hr
4x = 1/6
x = 1/24 fields/hr
So the son would take 24 hours to plow the field alone