60. Two trains 180 metres and 120 m...
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60. Two trains 180 metres and 120 metres in length are running towards each other on paral- lel tracks, one at the rate 65 km/hour and another at 55 km/hour. In how many sec- onds will they be clear of each other from the moment they meet? (1) 6 (2)9 (3) 12 (4) 15

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(2) Bption. sine rating ( p L_{2}=9 ) sec.
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