1.

A women in a car on a level road sees an airplane travelling in the same direction that is climbing at an angle of 30° above the horizontal. By driving at 110 km/h she is able to stay directly below the airplane. The airplane's velocity is

A. 127 km/h
B. 110 km/h
C. 220 km/h
D. 144 km/h
Answer» B. 110 km/h


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