Two boys starting from the same place walk at a rate of 5kmph and 5 5kmph respectively What time wil...........

Quantitative Aptitude ( CCS) Time & distance

Two boys starting from the same place walk at a rate of 5kmph and 5.5kmph respectively. What time will they take to be 8.5km apart, if they walk in the same direction?

12hrs

14hrs

15hrs

17hrs

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Explanation:

Solution:
The relative speed of the boys = 5.5kmph – 5kmph
= 0.5 kmph
Distance between them is 8.5 km
Time = Distance/Speed
Time= 8.5km / 0.5 kmph = 17 hrs .