SOLUTION: Alvin and Geraldine are addressing invitations to their wedding. Alvin can address one every thirteen seconds and Geraldine can do one in 40 seconds. how long will t take them to a
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Question 1069062: Alvin and Geraldine are addressing invitations to their wedding. Alvin can address one every thirteen seconds and Geraldine can do one in 40 seconds. how long will t take them to address 140 invitations? Found 2 solutions by josmiceli, ikleyn:Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! This is actually a "work" problem
Alvin's rate of working:
[ 1 invitation ] / [ 13 sec ]
Geraldine's rate of working:
[ 1 invitation ] / [ 40 sec ]
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Let = time in sec to address
140 invitations
Their rate working together:
[ 140 invitations ] / [ t sec ]
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Add their rates of working to get their
rate working together
Multiply both sides by sec
Convert this to minutes min
Convert the decimal part to seconds
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It will takes them 22 min 54 sec
You can put this solution on YOUR website! .
Alvin and Geraldine are addressing invitations to their wedding. Alvin can address one every thirteen seconds and Geraldine
can do one in 40 seconds. how long will t take them to address 140 invitations?
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Alvin is adressing of an invitation per second.
Geraldine is adressing of an invitation per second.
Working together, they are addressing of an invitation per second.
= = .
Hence, it will require seconds to complete the job.
