Question 1137086
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Solve using logical reasoning; algebra is not required.  (Unless, of course, this is for an algebra course, where an algebraic solution IS required...!)<br>
Together, the two of them covered 37.5 miles in half an hour; their combined speed was 75mph.<br>
A bit of mental arithmetic will then find that, if the sum of their speeds is 75mph and one speed is 15mph faster than the other, then the two speeds are 30mph and 45mph.