Subject: General Aptitude · Chapter: Problems on Trains · Exam: · Marks: · Difficulty:
What is the speed of the running train? (Bank P.O., 2006) I. The length of the train is 180 metres. II. The train crosses another stationary train of 120 metres length in 60 seconds.
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.
Explanation
Speed of the running train $$\begin{aligned} & =\frac{\text { Sum of the lengths of two trains }}{\text { Time taken to cross stationary train }} \\ & =\frac{(180+120)}{60} \mathrm{m} / \mathrm{s}=5 \mathrm{m} / \mathrm{s} . \end{aligned}$$ So, both the statements are necessary to get the answer. $$\text { ∴ The correct answer is }(e) \text {. }$$