ABC26GN3907 · Problems on Trains

Subject: General Aptitude · Chapter: Problems on Trains · Exam: · Marks: · Difficulty:

One local and another express train were proceeding in the same direction on parallel tracks at 29 km/ hr and 65 km/hr respectively. The driver of the farmer noticed that it took exactly 16 seconds for the faster train to pass by him. What is the length of the faster train?

(a)60 m

(b)120 m

(c)160 m

(d)240 m

Answer

Answer (as printed): C

Explanation

Relative speed $=(65-29) \mathrm{km} / \mathrm{hr}=36 \mathrm{km} / \mathrm{hr}$ $$=\left(36 \times \frac{5}{18}\right) \mathrm{m} / \mathrm{sec}=10 \mathrm{m} / \mathrm{sec} .$$ Length of faster train $=(10 \times 16) \mathrm{m}=160 \mathrm{m}$.

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