15
Q:
A) 15 hours | B) 16 hours |
C) 17 hours | D) 18 hours |
Answer: C) 17 hours
Explanation:
Explanation:
In this type of questions we need to get the relative speed between them,
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