Question
Two trains start from P and Q respectively and ravel towards each other at a speed of 50 km/hr and 40 km/hr respectively . By the time they meet , the first train has travelled 100 km more than the second . The distance between P and Q :
Answer: Option D
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At the time of meeting , let he distance travelled by the second train be `x` km.
Then, distance covered by the first train is `(x + 100)` m.
`:.` `x/40 = (x + 100)/(50) hArr 50x = 40x + 4000 hArr x` = 400 m.
So, distance between P and Q =` (x + x + 100)` km = 900 km
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