let v be the velocity of the boy

D/v = t1

D/(4v/3) = 3D/4v = t2

delta t = t1 - t2

we know that delta t = 4/3 and it also equals D/v - 3D/4v

4/3 = D/v - 3D/4v

4/3 = D/4v

D = 16v/3 = 48km

]]>I mean, Yea.. I thought it was going to be 48. Of course.

]]>Back Again: 50 mi at 60 mi/h = 0.8333... h,

There and Back: 100 mi, taking 1.25h + 0.8333... h = 2.08333... h

Speed: 100 / 2.08333 ... = 48 mph DONE

By the use of my trusty calculator.

Who thought it should be the average of 40 and 60 = 50 mph ??

]]>better be going. tlk 2morrow MAYBE!! spooky, i could be dead!

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