Subject: General Aptitude · Chapter: Problems on Trains · Exam: · Marks: · Difficulty:
A train crosses a pole in 10 seconds. What is the length of the train? (Bank P.O., 2003) I. The train crosses another train running in opposite direction with a speed of 80 km / hr in 22 seconds. II. The speed of the train is 108 km / hr.
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.
Explanation
Time taken to cross a pole $$=\frac{\text { Length of train }}{\text { Speed of train }} \Rightarrow 10=\frac{\text { Length of train }}{\left(108 \times \frac{5}{18}\right)}$$ ⇒ Length of the train $=300 \mathrm{m}$. Clearly, II is sufficient to get the answer. Also, I is not sufficient to get the answer. ∴ The correct answer is (b).