Converting Square Inches to Square FeetDate: 02/26/98 at 17:14:51 From: Zack Meier, Megan Wolf Subject: Area How many square inches are in ten square feet? Don't you take 12 times 10 to get an answer of 120 sq. in.? Date: 02/26/98 at 17:30:28 From: Doctor Ethan Subject: Re: Area Hello Zack, Great question. I see how you are getting your idea, but I am afraid that it is a bit more complex than that. The complexity comes because the question wants the answer in a different set of units than the units of the given information. Because of that I am going to ask another question first to help us get on our way: How many square inches are in one square foot? To help us answer this, I am going to draw a square foot with the inches marked off. 1 ft. = 12 inches - - - - - - - - - - - - | | | | | | | | | | | | 1 ft. = 12 in. | | | | | | | | | | | | - - - - - - - - - - - - Now, given this drawing to find the number of square inches in a single square foot, we multiply 12 * 12 = 144. According to your problem, we have 10 of these square feet, so we have 144 * 10 = 1440 sq. inches. Hope that helps. -Doctor Ethan, The Math Forum http://mathforum.org/dr.math/ |
Search the Dr. Math Library: |
[Privacy Policy] [Terms of Use]
Ask Dr. Math^{TM}
© 1994- The Math Forum at NCTM. All rights reserved.
http://mathforum.org/dr.math/