Question
A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?
Answer: Option A
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Relative speed = (120 + 80) km/hr
=\(\left(200\times\frac{5}{18}\right)m/sec\)
=\(\left(\frac{500}{9}\right)m/sec\)
Let the length of the other train be x metres.
Then,\(\frac{x+270}{9}=\frac{500}{9}\)
x + 270 = 500
x = 230.
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