A) 225 m
B) 200 m
C) 135 m
D) 90 m
Correct Answer: A
Solution :
[a] Let the length of the train be x m. According to the question, \[\frac{x}{9}=\,\text{speed}\] (i) and \[\frac{x+150}{15}=\text{speed}\] ...(ii) From Eqs. (i) and (ii), we get \[\frac{x}{9}=\frac{x+150}{15}\] \[\Rightarrow \] \[5x=3x+450\] \[\Rightarrow \] \[x=225\,m\] |
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