Quantitative Aptitude Ques 1389

Question: If a train runs at 30 km/h it reaches its destination late by 9 min. If it runs at 36 km/h it is late by only 3 min. The correct time for the train to complete its journey is

Options:

A) 20 min

B) 24 min

C) 27 min

D) 26 min

Show Answer

Answer:

Correct Answer: C

Solution:

  • Let the correct time to complete the journey be x min. Distance covered in $ (x+9) $ min at 30 km/h. Distance covered in $ (x+3) $ in 36 km/h.

$ \therefore $ $ \frac{x+9}{60}\times 30=\frac{x+3}{60}\times 36 $ $ x=27\min $

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