Question
350 metre long train ‘A’ is running with a speed of
43.2 km/hr. Train ‘B’ which is 387 metre long is running with a speed of 90 km/h in opposite direction of train ‘A’. For how much time, the smaller train is completely obscured by the larger train when they cross each other?Solution
Length of smaller train = 350 metre Speed of smaller train = 43.2 × (5/18) = 12 m/s Length of bigger train = 387 metres Speed of bigger train = 90 × (5/18) = 25 m/s Since, the smaller train is completely obscured by larger train, therefore, extra length of larger train = 387 – 350 = 37 metres Relative speed of trains ‘A’ and ‘B ‘= 12 + 25 = 37 m/s (Since, the trains are running in opposite direction) Required time = 37/37 = 1 second
366 276 196 126 66 ?
7 98 644 3145 12596 37797
...25, 200, 40, ?, 64, 512
D irection: Which of the following will replace ‘?’ in the following series
9, ‘?’, 1242, 1581, 1783
...80, 255, 624, ?, 2400, 4095
A series is 11, 20, 42, 82, 166, 330
If another series 4, a, b, c, d, 106 follows the same pattern as the given number series, then find the appr...
If 43 34 x 36 39 38
Then, (x/2) + 0.5 + x = ?
...6 16 116 566 2272 6814
11 a�...
4 ? 113 449 1343 2681
...3 15 35 63 99 ?
