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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 | |