A) 97 km
B) 42.23 km
C) 84.46 km
D) 48.64 km
E) None of these
Correct Answer: E
Solution :
Let the distance from Q to R be x km. \[\therefore \] P to \[R=\frac{x}{5}\] Upstream speed = 16 - 4 = 12 km/hr Downstream speed = 16 + 4 = 20 km/hr Now-\[\frac{6x}{5\times 12}+\frac{x}{20}=7.5\Rightarrow \frac{6x}{5\times 12}+\frac{x}{20}=7.5\]\[\Rightarrow \frac{x}{10}+\frac{x}{20}=7.5\Rightarrow 3x=7.5\times 20\] \[\therefore 50Km\]You need to login to perform this action.
You will be redirected in
3 sec