Speed of the train = 72 kmph i.e., 72 × 5/18 = 20m/s So, total distance cover in 20 seconds = 20 × 20 = 400m Speed of Car = 36kmph i.e, 36 × 5/18 = 10m/s Relative speed of Car and Train in Opposite direction = 20 + 10 = 30 m/s So, Distance cover in 6.5 seconds = Length of the train = 30 × 6.5 = 195m Hence, Length of the Platform = 400 – 195 = 205m
12, 18, 30, 54, ?, 198
4, 7, 12, 21, 36, ?
53 × 38 + 32 × ∛54872 = ?
?, 32, 75, 144, 245, 384
16, 24, 36, ?, 81, 121.5
4 9 28 99 ? 2105 12660
...41, 82, ?, 984, 4920, 29520
Complete the series choosing the missing number.
110, 99, 86, ___, 54, 35.
2 3 5 9 ? 33
...92, 88, 79, ?, 38, 2
