Question
Train A, at 90 km/h, crosses a pole in 8 seconds. Find
the time to cross a train which is 25% shorter than Train A, coming from the opposite direction at 36 km/h.Solution
Speed of Train A = 90 × 5/18 = 25 m/s
Length of Train A = 25 × 8 = 200 m
Length of Train B = 0.75 × 200 = 150 m
Speed of Train B = 36 × 5/18 = 10 m/s
Total length = 200 + 150 = 350 m
Relative speed = 25 + 10 = 35 m/s
Time = 350 / 35 = 10 seconds
32, 16, 24, 60, 207, 945
12, 23, 35, 47, 59, 73
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2, 3, 5, 7, 11, 13, 17, 20Find the wrong number in the given number series.
3, 7, 22, 89, 445, 2675Find the wrong number in given number series.
2556, 2613, 2734, 2841, 3012, 3221
Find the wrong number in the given number series.
32, 50, 72, 98, 128, 160
6Â Â Â 9Â Â Â 14Â Â Â Â 22Â Â Â Â 30Â Â Â Â Â 41Â Â Â Â Â
...- Find the wrong number in the given number series.
12, 20, 31, 45, 62, 84 1, 5, 40, 385, 5005, 85085
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