Question 318287
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Distance equals rate times time.


The first distance is:  *[tex \LARGE d_1\ =\ \frac{r}{2}].  The second distance is *[tex \LARGE d_2\ =\ \frac{3r}{2}]


Add 'em up:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ d_1\ +\ d_2\ =\ \frac{r}{2}\ +\ \frac{3r}{2}\ =\ 2r]



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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