A) 2.5 km
B) 3 km
C) 4 km
D) 5 km
Correct Answer: B
Solution :
Speed downstream = (5 + 1) km/h = 6 km/h Speed upstream = \[(5-1)\]km/h = 4 km/h Let the required distance be x km. Then, \[\frac{x}{6}+\frac{x}{4}=\frac{75}{60}=\frac{5}{4}\Rightarrow (2x+3x)=15\] \[\Rightarrow \] \[5x=15\]\[\Rightarrow \]\[x=3\] Required distance = 3 kmYou need to login to perform this action.
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