SOLUTION: Lynn can paint room in 40 min.
Jeff in 60 min.
How long if both paint together? Not sure what type of problem this is. fxn?
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-> SOLUTION: Lynn can paint room in 40 min.
Jeff in 60 min.
How long if both paint together? Not sure what type of problem this is. fxn?
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You can put this solution on YOUR website! Lynn can paint room in 40 min .Jeff in 60 min. How long if both paint together?
:
This is a typical shared work problem.
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Let t = time required when they work together (in minutes)
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Let the completed job = 1 (a painted room)
;
Each person will paint a fraction of the room, the two fractions add up to 1
: + = 1
We can clear the fractions by multiplying 120, resulting in:
3t + 2t = 120
:
5t = 120
t =
t = 24 minutes working together
:
:
We can prove that + = 1
reduce the fractions + = 1
:
:
This is a good method for most shared work problems.
