Answers

2014-05-28T15:50:48+08:00
First, convert 3 3/4 hours into an improper fraction for easier computation.  Thus, we get 15/4

1.) 15km : 15/4 hr = x km : 1/2
      15/2 = 15x/4
       x = 8 km
2.) Again, convert 1 1/6 into an improper fraction, yielding 7/6
     15km : 15/4 hr = x km : 7/6 hr
     (15)(7)/6 = 15x/4
      x = 28/6 hr = 14/3 hr = 4 2/3 hr = 4 hrs, 40 min

Hope this helps :)

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