A) 45 km
B) 64 km
C) 68 km
D) 80 km
Correct Answer: D
Solution :
[d] Let the distance between the two parts = ?x? km Let the speed of steamer in still water = ?y? km/hr. \[\therefore\] \[\frac{x}{y-2}=4\Rightarrow x=4y+8\] ? (1) \[\frac{x}{y-2}=5\Rightarrow x=5y-10\] ? (2) From (1) and (2) 4y + 8 = 5y ? 10 \[\Rightarrow y=18\] \[\therefore\] From (1) \[x=4\times 18+8=80\,km.\]You need to login to perform this action.
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