A) 6.5 km/h
B) 5.5 km/h
C) 6 km/h
D) 5 km/h
Correct Answer: B
Solution :
[b] Let the speed of the boat be x km/h and the speed of water be y km/h. Then, \[x-y=\frac{40}{8}=5\] (i) And \[x+y=\frac{36}{6}=6\] (i) on solving Eqs. (i) and (ii), we get \[x=5.5\]and\[y=0.5\] |
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