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     EduGorilla 
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    P and Q are stations 490 km apart with two parallel tracks. A train leaves P for Q at 10 a.m. at a speed of 40 km/hr. Another train leaves Q for P at 11 a.m., at a speed of 50 km/hr. They will cross each other at

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    1. 3 p.m.

    2. 4 p.m

    3. 5 p.m.

    4. 6 p.m

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