While covering a distance of 24 km, Ram noticed that after walking for 1 hour and 40 minutes, the distance covered by him was 5 of the remaining distance. What was Ram’s speed in metres per second?
A. 1 2/3
B. 3 5/10
C. 5 6/8
D. 12 7/9

• there is mistake in question . covered by him was 5/7 of the remaining distance.
  
  d represents the remaining distance
  
  5d/7 represents the distance covered
  
  
  
  d + 5d/7 = 24 multiply both sides by 7
  
  7d + 5d = 168 combine like terms
  
  12d =168 divide both sides by 12
  
  d = 14
  
  
  
  5(14)/7 = 10
  
  
  
  The first 10 km were covered in 1:40.
  
  
  
  His rate is
  
  
  
  10km /1:40 convert hour/minutes to seconds (1 hour = 3600 seconds)
  
  10km/6000sec convert km to m
  
  10000m/6000sec reduce
  
  10m/6sec reduce
  
  1.66m/sec
  
  
  answer is A
  The man is a very fast walker!
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