Question
Train ‘A’ running with a speed of 126 km/hr can
cross a standing goods train of 6 times its length in 30 seconds. Find the time taken by 200 metres long train ‘B’ which is coming from opposite direction of train ‘A’, with a speed of 20 m/s, to cross train ‘A’.Solution
Let the length of train ‘A’ be ‘x’ metres Therefore, length of the goods train = ‘6x’ metres Speed of train ‘A’ = 126 × (5/18) = 35 m/s According to the question, 6x + x = 35 × 30 => 7x = 1050 => x = 150 Therefore, time taken by train ‘B’ to cross train ‘A’ = {(150 + 200)/(30 + 20)} = 7 seconds
To find the Next number in the given series.
6 9 13 19 29 47 ?
...3 4.5 6.75 10.125 15.1875 22.78125 ?
...55 46 60 41 65 36 ?
If the first term of the arithmetic progression is 18, the common difference is 5, and the number of terms in the series are 40, then find the sum of th...
14 15 34 116 460 2325
...9 16 56 318 2424 25070
...200 ? 96 38.4 7.68 0
...4096 2048 514 64 4
...Select the option in which the numbers are related in the same way as are the numbers of the following set.
(25, 18, 225)
130   136   148   166    ?    232
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