Two trains start from opposite directions 200 km apart at the same time. They cross each other at a distance of 110 km from one of the stations. What is the ratio of their speeds ?
A
11:20
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B
9:20
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C
11:9
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D
17:9
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Solution
The correct option is A11:9 In same time, they cover 110km & 90km respectively. For the same time speed and distance is inversely proportional. so ratio of their speed =110:90=11:9