Two boys starting from the same place walk at a rate of 5kmph and 5.5kmph respectively. What time will they take to be 11km apart, if they walk in the same direction? Choose the correct choice from the following:
A) 15 hours	B) 16 hours	C) 17 hours	D) 20 hours	E) 22 hours
The relative speed of the boys = 5.5kmph â€“ 5kmph   = 0.5 kmph   Distance between them is 11 km   Time = Distance/Speed   Time=11km / 0.5 kmph = 17 hrs   answer :22 hours
<result>E</result>
Two boys starting from the same place walk at a rate of 5kmph and 5.5kmph respectively. What time will they take to be 11km apart, if they walk in the same direction?