A) 12 km
B) 15 km
C) 10 km
D) 20 km
Correct Answer: A
Solution :
Speed downstream \[=(8+2)\,\,\text{km/h}=10\text{ km/h}\] Speed upstream\[=(8-2)\,\,km/h=6km/h\] Let the required distance be x km. Then, \[\frac{x}{10}+\frac{x}{6}=\frac{16}{5}\] \[\Rightarrow \] \[3x+5x=96\] \[\Rightarrow \] \[8x=96\] \[\Rightarrow \] \[x=12\] Required distance =12 kmYou need to login to perform this action.
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