Question
Train ‘A’ travelling with a speed of 75 km/h can
cross a pole in 15 seconds. If the length of train ‘B’ is 24% less than that of train ‘A’ and it can cross a pole in 15 seconds then speed (in km/h) of train ‘B’ is:Solution
Speed of train ‘A’ = 75 × (5/18) = (125/6) m/s Length of train ‘A’ = (125/6) × 15 = 312.5 metres Length of train ‘B’ = 0.76 × 312.5 = 237.5 metres Speed of train ‘B’ = (237.5/15) × (18/5) = 57 km/h
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What will come in place of the question mark (?) in the following series?
48, 291, ?, 399, 408, 411
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- What will come in place of the question mark (?) in the following series?
24, 27, 34, 46, 64, ? 150 Â Â Â 15Â Â Â 3Â Â Â ? Â Â Â Â 0.36Â Â Â Â 0.18
13, 28, ?, 118, 238, 478
3   2    10   ?   17   16
32, 64, 8, ?, 2, 4Â
8, 9, 125, ?, 1331, 169Â
226  231   466  ?  5606  28031    Â
 5, 6, 14, 45, 184, ? Â
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