Question 987387
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*[illustration WalkOnBoardwalk.jpg]


He walks at 4 feet per second for a distance of *[tex \Large 720\ -\ x], then at 2 feet per second for a distance of *[tex \Large \sqrt{210^2\ +\ x^2}].  Time is distance divided by rate, so:



*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \frac{720\ -\ x}{4}\ +\ \frac{\sqrt{210^2\ +\ x^2}}{2}]


is the number of seconds required to walk the entire distance.  Set this expression equal to the number of seconds in 4 minutes 45 seconds and then solve for *[tex \Large x].  Then calculate *[tex \Large 720\ -\ x] for the answer to the question as posed.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \