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Expert: - 4/28/2010


Question
Paul can address 75envelopes in 1 hour, but ann can do the same number in half an hour. Working together, how long will it take them to address 75 envelopes?

Answer
Since Ann works twice as fast, she can address 150 envelops in an hour.
Between them, that is 150+75=225 envelopes an hour.

Now 225 is 3*75, so that means they would do 75 3 times in an hour.
Since 3*20 minutes is an hour, it would take them 20 minutes together.

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Scott A Wilson

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Any algebraic question you've got, like linear, quadratic, exponential, etc.

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