A) 10 km
B) 15 km
C) 20 km
D) 30 km
Correct Answer: A
Solution :
\[\theta =\frac{l}{r},\theta =1\min .\] So, \[\theta =\frac{1}{60{}^\circ }=\frac{\pi }{180}\times \frac{1}{60}rad\] and \[l=3m\] \[\therefore \] \[x=r=\frac{l}{\theta }\] \[=\frac{3}{\frac{\pi }{180}\times \frac{1}{60}}=10\,km\]You need to login to perform this action.
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