A) 10
B) 10.8
C) 9
D) 9.6
Correct Answer: B
Solution :
Total length of trains\[=140+160=300\,\,\text{m}\] Relative speed \[=60+40=100\,\,\text{km/h}\]\[=100\times \frac{5}{18}\text{m/s}=\frac{250}{9}\text{m/s}\] \[\therefore \]Time taken to cross each other \[=\frac{300}{\frac{250}{9}}=\frac{300\times 9}{250}=10.8\,\,\text{s}\]You need to login to perform this action.
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