A) \[9\,\,\min \]
B) \[\frac{9\sqrt{3}}{10}\,\,\min \]
C) \[25\,\,\min \]
D) \[15\,\,\min \]
Correct Answer: B
Solution :
In \[\Delta \,ABC,\] \[\tan \,{{30}^{o}}=\frac{87}{x}\] \[\Rightarrow \] \[x=87\times \sqrt{3}m\] \[\therefore \] \[Speed=\frac{\text{distance}}{time}\] Time \[=\frac{87\times \sqrt{3}\times 60}{5.8\times 1000}=\frac{9\sqrt{3}}{10}\,\min \]You need to login to perform this action.
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