RRB ALP 2013 Ques 10
Question: A 130 m long train crosses a bridge m 30 seconds at 45 kmph. The length of the bridge is
Options:
A) 200 m
B) 245 m
C) 225 m
D) 250 m
Show Answer
Answer:
Correct Answer: B
Solution:
- Speed $ =45kmph=45\times \frac{5}{18}=12.5m/s $ Let, length of the bridge $ =xm $ ; then $ \frac{130+x}{12.5}=30 $
$ \Rightarrow $ $ 130+x=375 $
$ \therefore $ $ x=375-130=245m $ .
BETA
