A) 80 m
B) 90 m
C) 200 m
D) 150 m
Correct Answer: C
Solution :
Let the length of train be x metres. |
As given, |
\[\text{Speed}=\frac{x+800}{100}\] ...(i) |
\[\text{Speed}=\frac{x+400}{60}\] ...(ii) |
\[\therefore \] \[\frac{x+800}{100}=\frac{x+400}{60}\] |
\[\Rightarrow \] \[\frac{x+800}{5}=\frac{x+400}{3}\] |
\[\Rightarrow \] \[5x+2000=3x+2400\] |
\[\Rightarrow \] \[2x=400\] |
\[\Rightarrow \] \[x=\frac{400}{2}=200\,\,\text{m}\] |
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