Two aeroplanes are flying straight towards each other. One is traveling at 10 ki

游客2024-08-08 26

问题 Two aeroplanes are flying straight towards each other. One is traveling at 10 kilometres per minute, and the other at 15 kilometres per minute. Assuming that the planes are exactly 1,000 kilometres apart, what distance will be between them one minute before they crash into each other?

选项 A、10 kilometers.
B、15 kilometers.
C、25 kilometers.
D、5 kilometers.

答案 C

解析两架飞机相向飞行，一架飞行速度每分钟10公里，另一架每分钟15公里，那么如果相撞，相撞前一分钟时两架飞机的距离应该是10+15=25公里。选项C正确。

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