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Question 232420: Can someone please walk me through this?
In 1 hours, a secretary can address 100 envelopes. Another secretary can address 100 envelopes in 10 hours. How long would it take the secretaries, working together, to address 300 envelopes? (Hint: Think of addressing 300 envelopes as three 100-envelope jobs.)
____ hours
Thank you,
Alan
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! In 1 hours, a secretary can address 100 envelopes. Another secretary can address 100 envelopes in 10 hours. How long would it take the secretaries, working together, to address 300 envelopes?
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S1 does 100/hr
S2 does 10/hr
Together, they do 110/hr
300/110 = ~ 2.72727... hours for 300
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