Subject
Quantitative Aptitude
Topic
Speed & Distance
A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is:
A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is:
ক)
50 mখ)
150 mগ)
200 mঘ)
Data inadequateExplanation
Let the length of the train be x metres and its speed by y m/sec. Then, x/y = 15 => y = x/15 So, (x + 100)/25 = x/15 => 15(x + 100) = 25x => 15x + 1500 = 25x => 1500 = 10x => x = 150 m.Related questions
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