A) 3.4 km/h
B) 1.2 km/h
C) 9.7 km/h
D) 11.2 km/h
Correct Answer: B
Solution :
Speed downstream \[=\frac{30}{5}\text{km/h}\,\,\text{=}\,\,\text{6}\,\,\text{km/h}\text{.}\] Speed upstream \[=\frac{18}{5}\text{km/h}\,\,\text{=}\,\,\text{3}\text{.6}\,\,\text{km/h}\] Velocity of the stream \[=\frac{1}{2}(6-3.6)km/h\] \[=\frac{2.4}{2}\text{km/h}\]You need to login to perform this action.
You will be redirected in
3 sec