A) 2.5 km
B) 3 km
C) 2.4 km.
D) 3.6 km
Correct Answer: C
Solution :
Let the distance be \[x\] fern. Speed upstream \[=5+1=4\,\,\text{km/h}\] Speed downstream\[5+1=6\,\,\text{km/h}\] \[\therefore \] \[\frac{x}{6}+\frac{x}{4}=1\]\[\Rightarrow \]\[\frac{2x+3x}{12}=1\]\[\Rightarrow \]\[5x=12\] \[\Rightarrow \] \[x=\frac{12}{5}=2.4\,\,\text{km}\]You need to login to perform this action.
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