A) 18 sec
B) 24 sec
C) 30 sec
D) 15 sec
Correct Answer: B
Solution :
Speed = 60 kmph \[\Rightarrow \] Total distance\[=(140+260)m=400\,m\] Time taken to cross the tunnel \[{{a}_{1}}:{{a}_{2}}::{{b}_{2}}:{{b}_{1}}\] \[8\times 32=256,16\times 16=256,32\times 8=256\]
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