Question 395814
   <pre><font size = 3 color = "indigo"><b>
Hi
D = r*t  OR D/r = t
Questions states*** Total time was 6 hrs
 
D/18mph + D/12mph = 6hrs  |multiplying each term by 36mph so as all denominators=1
  2D + 3D = 6hr*36mph
      5D = 216mi
       D = 43.2mi,the distance of the island from the harbor