Discussion
Two passenger trains start at the same hour in the day from two different stations and move towards each other at the rate of 16 kmph and 21 kmph respectively. When they meet, it is found that one train has traveled 60 km more than the other one. The distance between the two stations is?
Answer: B
The 60 km difference comes from the difference in speeds.
\[ 21t - 16t = 60 \quad\Longrightarrow\quad 5t = 60 \quad\Longrightarrow\quad t = 12 \text{ h} \]
They approach at \( 16 + 21 = 37 \) kmph:
\[ d = 37 \times 12 = 444 \text{ km} \]
Checking: 192 km and 252 km, differing by exactly 60.
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