A) Rs.365
B) Rs. 385
C) Rs.219
D) Cannot be determined
Correct Answer: A
Solution :
Rate upstream \[=\left( \frac{10}{\frac{30}{60}} \right)=20\] kmph Rate downstream \[=\left( \frac{10}{\frac{25}{60}} \right)\] kmph \[=\frac{10\,\,\,\,\,60}{25}\] = 24 kmph. \[\therefore \] Speed of the river current \[=\frac{1}{2}(24\,\,\,\,\,\,20)=2\] kmph.You need to login to perform this action.
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