1.Two trains A and B start simultaneously in the opposite direction from two points P and Q and arrive at their destinations 16 and 9 hours respectively after their meeting each other. At what speed does the second train B travel if the first train travels at 120 km/h
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Explanation:
s1/s2= √t2/t1
⇒120/s2= √9/16 = 3/4
⇒s2 = 160 km/h
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