5 votes 5 votes A train that is $280$ metres long, travelling at a uniform speed, crosses a platform in $60$ seconds and passes a man standing on the platform in $20$ seconds. What is the length of the platform in metres? Quantitative Aptitude gate2014-ec-1 quantitative-aptitude speed-time-distance normal numerical-answers + – makhdoom ghaya asked Mar 18, 2016 • retagged Jun 23, 2017 by Arjun makhdoom ghaya 4.4k views answer comment Share Follow See 1 comment See all 1 1 comment reply Abhishek Rauthan commented Apr 14, 2023 reply Follow Share 1.When a train cross a pole or a person then it covers the distance equal to its length.(length of train) 2.When a train cross another train or a platform than it covers distance equal to sum of both length(length of train+length of platform) 1 votes 1 votes Please log in or register to add a comment.
Best answer 18 votes 18 votes Speed of train$=280/20=14m/s$ Let $L$ be the length of platform $280+L$ covered in $60s$ $\frac{280+L}{14}=60$ $280+L=840$ $L=840-280$ $L=560m$ Pooja Palod answered Mar 18, 2016 • edited Jun 8, 2018 by Arjun Pooja Palod comment Share Follow See all 0 reply Please log in or register to add a comment.
5 votes 5 votes For a train to cross a person, it takes 20 seconds for its 280m. so d=s*t then 280=s*20 then we get s=14m/s and in 60 seconds. Total distance travelled should be 840 bcz d=14*60 =840. Including 280 train length so length of plates =840-280=560 so answer is 560 rajan answered Mar 18, 2016 • reshown Mar 18, 2016 by rajan rajan comment Share Follow See all 0 reply Please log in or register to add a comment.