A Problem from Delta Airlines In-flight Magazine

A cow is tethered to a stake by a 14-foot rope. The cow eats 100 square feet of grass a day. For how many days does the cow get enough to eat?

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HINTS: is 14 feet the radius or the diameter? Draw a picture.
Do you know the formula for area of a circle? Pie are square (no! Pie are round).

Warning! When a multiple choice question says 'you may use 3.14 for Pi," DO SO! Otherwise, your answer will not match any of the multiple choices.

But, for here and now, you can do this without a calculator by using 22/7 for Pi and using appropriate cancellations.

Also from continued fractions, Pi almost equals 355/113. This is neat because it uses odd numbers in pairs: 11 33 55. I use it to test calculators.

Coded Answer: Fvk qnlf.

Click this: ==>  Link to rot13.com to decode. This answer is so short that you can write it down and type it in. Or, as always, copy and paste.