Quantitative Aptitude Ques 777
Question: A train speeds past a pole in 20 s and speeds past a platform 100 m in length in 30 s. What is the length of the train? [RRB (SO) 2010]
Options:
A) 100 m
B) 150 m
C) 180 m
D) 200 m
E) None of these
Show Answer
Answer:
Correct Answer: D
Solution:
- Let the length of train be x m.
$ \therefore $ Speed of train $ =\frac{x}{20}=\frac{x+100}{30} $
$ \Rightarrow $ $ 3x=2x+200 $
$ \Rightarrow $ $ x=200 $
BETA
