Question
How many seconds will a train 60 m in length, travelling
at the rate of 40 km an hour, take to pass another train 90 m long, proceeding in the same direction at the rate of 28 km an hour?Solution
Relative speed = 40 – 28 = 12 km/hr Speed (m/sec) = 12 × (5/18) = 10/3 m/sec Time = Total length of both the trains/Relative speed => Time = (90 + 60)/(10/3) = 45 sec
324Â Â Â Â Â Â Â Â 972Â Â Â Â Â Â Â Â 486Â Â Â Â Â Â Â Â 1458Â Â Â Â Â Â 729Â Â Â Â Â Â Â Â ?
...What will come in place of the question mark (?) in the following series?
81, 83, 87, 95, 111, ?
48, 24.5, ?, 39.75, 81.5, 206.25, 621.75
What value should come in the place of (?) in the following number series?
14, 18, ?, 43, 68, 104
14, 20, 29, 44, 65, ?
16, 16, 32, 96, ?, 1920
What will come in place of (?) Question mark in the given number series.
500, 489, 467, 434, 390, 335, ?
72, 79, 100, 135, 184, ?
79Â Â Â Â Â 86Â Â Â Â Â Â 76 Â Â Â Â Â Â 89Â Â Â Â Â Â 73 Â Â Â Â Â Â ?
...290, 571, 900, ?, 1485, 1890
