A) 200 km
B) 160 km
C) 180 km
D) 190 km
Correct Answer: C
Solution :
[c] Downstream speed = 14 + 4 = 18 km/hr Upstream speed = 14 ? 4 = 10 km/hr Let the distance between A and B = ?x? km \[\therefore \] \[\frac{x}{18}+\frac{\frac{x}{2}}{10}=19\] \[\therefore \] \[\frac{x}{18}+\frac{x}{20}=19\] \[\frac{10x+9x}{180}=19\] \[\frac{19x}{180}=19\Rightarrow x=180\,km\]You need to login to perform this action.
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