Question
Two trains X and Y start at the same time in the
opposite direction from two points P and Q and arrive at their destinations 25 and 16 hours respectively after their meeting each other. At what speed does the second train Y travel if the first train travels at 60 km/h.Solution
Let the speed and time of two trains be s1 and s2, and t1 and t2. s1/s2 = (t2/t1)1/2 => 60/s2 = 4/5 => s2 = 75 km/hr.
412, 537, 573, 916, 980, ?
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...The questions below are based on the given Series-I. The series-I satisfies a certain pattern, follow the same pattern in Series-II and answer the ques...
230, 34.5, ‘?’, 0.77625
800    544    416    352    ?     304
76, 82, 158, 240, 398, 638, ?
123   125   129   132   ?   145
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5, 11, 32, 65, ?, 389
