Multiple choice

Two trains starting at the same time from two stations 200 km. apart and going in opposite direction cross each other at a distance of 110 km. from one of them. The ratio of their speeds is - दो ट्रेन एक ही समय पर 200 किमी. की दूरी पर दो स्टेशनों से विपरीत दिशा में चलना प्रारम्भ करती है। उनमें से एक से 110 किमी. की दूरी पर वे एक दूसरे को पार करती है तो उनकी चालों का अनुपात क्या है?

  1. 11 : 20

  2. 9 : 20

  3. 11 : 9

  4. 11 : 10
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C Correct answer
Explanation

Total distance = 200 km. They cross at 110 km from one station, so one train traveled 110 km and the other traveled 200 - 110 = 90 km in the same time. Speed ratio = Distance ratio = 110:90 = 11:9. This works because when two objects start simultaneously and travel for equal durations, their speeds are directly proportional to distances covered.

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