1.

A person observes from an upward observation tower that a car is coming towards the tower with the same speed. If it takes 12 minutes to change the depression angle from 30° to 45°, how soon will the car reach the inspection tower?

A. 16 minutes 23 seconds
B. 12 minutes 34 seconds
C. 11 minutes 23 seconds
D. 12 min 50 sec
Answer» B. 12 minutes 34 seconds


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