Two persons starting from the same place walk at a rate of 5kmph and 5.5kmph respectively. What time will they take to be 12.5km apart, if they walk in the same direction? Select:
A) 17 hrs  B) 22 hrs  C) 25 hrs  D) 12 hrs  E) 14 hrs
The relative speed of the boys = 5.5kmph â€“ 5kmph   = 0.5 kmph   Distance between them is 12.5 km   Time= 12.5km / 0.5 kmph = 25 hrs   Answer : 25 hrs.
<result>C</result>
Two persons starting from the same place walk at a rate of 5kmph and 5.5kmph respectively. What time will they take to be 12.5km apart, if they walk in the same direction?