Two stations A and B are 110 kms apart on a straight line. One train start from A at 7 a.m. and travels towards B at 20 km per hour speed. Another train starts from B at 8 a.m. and travels towards A at a speed of 25 km per hour. At what time will they meet?

9 a.m.
10 a.m
11 a.m
None of these

Correct Answer: 10 a.m

Explanation:

Suppose they meet T hrs after 7 a.m
∴ Distance covered by A in T hrs = (20 x T) km
Distance covered by B in (T - 1) hrs = 25(T - 1) km
∵ 20T + 25 (T -1) = 110
⇒ 45 x T = 135
∴ T = 3 hours
So, they meet at 10 a.m.

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