A) 12 km/h
B) 10 km/h
C) 8 km/h
D) 6 km/h
Correct Answer: C
Solution :
Let the speed of Ravi be x km/h. \[\therefore \] Ajay's speed \[=(x+4)\text{ km/h}\] Distance covered by Ajay \[=60+12=72\,\,km\] Distance covered by Ravi \[=60-12=48\,\,km\] According to the question, \[\frac{72}{x+4}=\frac{48}{x}\] \[\Rightarrow \] \[\frac{3}{x+4}=\frac{2}{x}\] \[\Rightarrow \] \[3x=2x+8\] \[\Rightarrow \] \[x=8\,\,\text{km/h}\]You need to login to perform this action.
You will be redirected in
3 sec