SOLUTION: Marlo can dig a ditch in 2 hours and his daughter can dig the same size ditch in 4 hours ,working together how long will it take them to dig the ditch

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Question 884722: Marlo can dig a ditch in 2 hours and his daughter can dig the same size ditch in 4 hours ,working together how long will it take them to dig the ditch
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
1%2F2+%2B+1%2F4+=+1%2Fx
2x + x = 4
3x = 4
x = 4/3 hr or 1hr, 20min together