Question
Two trains 180 metres and 120 metres in length are
running towards each other on parallel tracks, one at the rate 42 km/hr and another at 30 km/hr. In how many seconds will they be clear of each other from the moment they meet?Solution
Required time = Sum of the lengths of trains / Relative speed Relative speed = 42 + 30 = 72 kmph = (72 × 5)/18 = 20 m/sec Required time = (180 + 120)/20 = 300/20 = 15 seconds
More Trains Questions
- Find the wrong number in the given number series.
15, 23, 35, 51, 71, 85 Find the wrong number in the given number series.
2, 6, 12, 22, 30, 42126, 295, 520, 807, 1170, 1611
- Find the wrong number in the given number series.
5, 30, 255, 860, 2105, 4130 5 4 15 36 107 226
154 165 143 175 132 187
...120, 136, 111, 147, 93, 162, 81
Find the wrong number in the given number series.
12, 6, 6, 9, 18, 54
A-5, A, 35, 52, 78, 115
128, 128, 64, 192, 42 , 240
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