Two stations P and Q are 110 km apart on a straight track. One train starts from P at 7 a.m. and travels towards Q at 20 kmph. Another train starts from Q at 8 a.m. and travels towards P at a speed of 25 kmph. At what time will they meet? Choose the correct option:	A) 10.30	B) 10	C) 8.45	D) 9.3	E) 11
Explanation:   Assume both trains meet after x hours after 7 am   Distance covered by train starting from P in x hours = 20x km   Distance covered by train starting from Q in (x-1) hours = 25(x-1)   Total distance = 110   =&gt; 20x + 25(x-1) = 110   =&gt; 45x = 135   =&gt; x= 3   Means, they meet after 3 hours after 7 am, ie, they meet at 10 am. Answer: 10
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Two stations P and Q are 110 km apart on a straight track. One train starts from P at 7 a.m. and travels towards Q at 20 kmph. Another train starts from Q at 8 a.m. and travels towards P at a speed of 25 kmph. At what time will they meet?