Question
Two trains start at the same time from Dehradun and
Jaipur and proceed toward each other at the speed of 55 km/hr and 25 km/hr respectively. When they meet, it is found that one train has travelled 150 km more than the other. Find the distance between Dehradun and Jaipur.Solution
Sol: Difference between speed of train from Dehradun and that of Jaipur = 30 km/hr That means train from Dehradun runs 30 km more than train from Jaipur in 1 hour. Therefore, train from Dehradun must have run 150 km more than train Jaipur in 5 hrs. That means both the trains have run for 5 hrs, when they met. Distance covered by train from Dehradun in 5 hrs = Speed × Time = 55 × 5=275 km. Distance covered by train from Jaipur in 5 hrs = Speed × Time = 25 × 5= 125 km. Total Distance between train from Dehradun and Jaipur = 275km + 125km = 400 km.
21, 28, 39, 52, ?, 88
- What will come in place of the question mark (?) in the following series?
24, 35, 57, 90, 134, ? 96, 144, ?, 324, 486, 729, 1093.5
4 10 ? 62.5 156.25 390.625
...6, 30, 43, 58, 75, ?
- What will come in place of (?) in the given number series.
3, 6, 13, 26, 43, ? 72, 79, 100, 135, 184, ?
11, ? 220,  660, 1320,  1320Â
15.5, 62, 186, ?, 2232, 8928
48, 24.5, ?, 39.75, 81.5, 206.25, 621.75
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