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Two trains having equal lengths, take 10 seconds and 15 seconds respectively to cross a post. If the length of each train is 120 meters, in what time (in seconds) will they cross each other when traveling in opposite direction? | |
A. | 10 [Wrong Answer] |
B. | 12 [Correct Answer] |
C. | 47 [Wrong Answer] |
D. | 21 [Wrong Answer] |