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
What will come in place of the question mark (?) in the following series?
20, ?, 30, 60, 150, 450
-1, 5, 23, 59, ?
Find the missing number in the given number series.
2, 5, 11, 23, 47, ?48, 24.5, ?, 39.75, 81.5, 206.25, 621.75
What will come in place of the question mark (?) in the following series?
24, 36, 16, 46, 4, ?, -12
What will come in place of the question mark (?) in the following series?
146, 122, ? , 74, 50, 26
660, 653, 639, 618, 590, ?
65, 90, 140, ?, 315, 440
64, 66, 69, 74, 81, ?
- What will come in place of the question mark (?) in the following series?
10, 17, 26, 37, 50, ?
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