A) 10
B) 10.8
C) 9
D) 9.6
Correct Answer: B
Solution :
Total length of trains \[=140+160=300\,m\] 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 \[=\frac{300}{\frac{250}{9}}=\frac{300\times 9}{250}=10.8\,s\]You need to login to perform this action.
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