Discussion :: Problems on Trains

Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 a.m. and travels towards B at 20 kmph. Another train starts from B at 8 a.m. and travels towards A at a speed of 25 kmph. At what time will they meet?
Answer : Option B
Explanation :
Suppose they meet x hours after 7 a.m.
Distance covered by A in x hours = 20x km.
Distance covered by B in (x  1) hours = 25(x  1) km.
20x + 25(x  1) = 110
45x = 135
x = 3.
So, they meet at 10 a.m
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