Question:A train travelling with a constant speed crosses a 96 m long platform in 12 seconds and another 141 m long platform in 15 seconds.The length of the train is : 

A 80 m 
B 64 m 
C 84 m 
D 90 m 

+ Answer
C 

+ Explanation
Let the length of the train be x metres.Then,

`(96 + x)/12`

`= (141 + x)/15 => 15 (96 + x)`

`= 12 (141 + x) => x = 84 m.`

+ Report

Irin Moni

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