Word Problems/Proportions

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Question
6 men can build a wall 96 feet long in 18 days when the day is 11 hours long; how many men must be employed to build 64 feet of wall in 2 days when the day is 12 hours long?

Answer: 33 men

Which units from the above are inversely proportional and which units are directly proportional and why?

I thank you for your reply.

Answer
Here's how to work the problem:
http://www.flickr.com/photos/dwread/8453744610/

Man-hours varies directly with the length of the wall.

Number of days varies inversely with number of men.
Number of days varies inversely with hours in a day.
By extension, number of days varies inversely with man-hours.

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Janet Yang

Expertise

Word problems are my favorite type of math questions! I would not feel comfortable answering questions that require specialized knowledge (Physics, Statistics, etc.) because I have not studied these in depth.

Experience

I tutor students (fifth through twelfth grades) and am a Top Contributor on Yahoo!Answers with over 24,000 math solutions.

Publications
Co-author of An Outline of Scientific Writing: For Researchers With English as a Foreign Language.

Education/Credentials
I have a Bachelor's degree in Applied Mathematics from the University of California at Berkeley, and a Master of Business Administration degree from The Wharton School.

Past/Present Clients
George White Elementary School. Homework Help program at the Ridgewood Public Library, Ridgewood, NJ. Individual students.

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