A) 3
B) 4
C) \[\sqrt{21}\]
D) 1
Correct Answer: A
Solution :
[a] Speed along the shortest path \[=\frac{1}{15/60}=\text{4 km/hr}\] Speed of water \[\text{v}=\sqrt{{{5}^{2}}-{{4}^{2}}}=3\text{ km/hr}\]You need to login to perform this action.
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