Question 392713
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Hi
Let x and (3/5)x represent the time taken for 2nd and 1st half respectively
Question states***
 x + (3/5)x = 48min
solving for x
 8/5 x = 48min
     x = (5/8)*48min
     x = 30min, time taken for 2nd half.  1st half took 18min.   (3/5)*30min

CHECKING our answer
  18min + 30min = 48min