Discussion
Two trains start at same time from two stations and proceed towards each other at the rate of 20 km/hr and 25 km/hr respectively. When they meet, it is found that one train has traveled 60 km more than the other. What is the distance between the two stations?
Answer: B
The extra 60 km comes from the difference in speeds.
\[ 25t - 20t = 60 \quad\Longrightarrow\quad 5t = 60 \quad\Longrightarrow\quad t = 12 \text{ h} \]
They approach at \( 20 + 25 = 45 \) km/hr:
\[ D = 45 \times 12 = 540 \text{ km} \]
Checking: 240 km and 300 km, differing by exactly 60.
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