ABC26GN3882 · Problems on Trains

Subject: General Aptitude · Chapter: Problems on Trains · Exam: · Marks: · Difficulty:

A train travelling with a constant speed crosses a

(a)13.33

(b)26.67 96-metre long platform in 12 seconds and another

(c)40

(d)66.67 141-metre long platform in 15 seconds. The length

Answer

Answer (as printed): A

Explanation

Let the length of the train be x metres. x + 96 x + 141 \ = 12 15 ⇔ 15 (x + 96) = 12 (x + 141) ⇔ 3x = 1692 – 1440 = 252 ⇔ x = 84 m.  x + 96   84 + 96  Speed of the train =   m/sec =   m/sec  12   12  = 15 m/sec  18  =  15 ×  km/hr = 54 km/hr.  5 

Explanation as extracted from the printed page; notation may be imperfect.

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