Question: If I walk at 5 km/h, I miss a train by 7 min. If however, I walk at 6 km/h, I reach the station 5 min before the departure of the train. The distance (in km) between my house and the station is
Options:
A) 6
B) 5
C) 4
D) 3
Show Answer
Answer:
Correct Answer: A
Solution:
- If the required distance be x km.
Then, according to the question,
$ \frac{x}{5}-\frac{x}{6}=\frac{12}{60} $
$ \Rightarrow $ $ \frac{6x-5x}{30}=\frac{1}{5} $
$ \Rightarrow $ $ \frac{x}{30}=\frac{1}{5} $
$ \Rightarrow $ $ x=6,km $