Question 388065
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Hi
D = r*t, In  2, 3, 4 distances are the same and questions are done similarly
 2. 8kmph*t = 5kmph*(3.25hr-t)  
solve for t 
    13kmpht = 5kmph*3.25hr
         t = 5*3.25/13kmph 
         t = 1.25hr     8kmph*1.25hr = 10km.  Total distance walked = 20km
5.   18*x = 16*(x+2) where x is the number of days
solve for x
   18x = 16x+ 32
     2x = 32
      x = 16 days    18/day*16days = 288 sweets
CHECKING our Answer
   288 = 16/day* 18days = 288