Question

A train takes 25 seconds and 17 seconds respectively to cross two bridges 210m and 122m long. Find the length and speed of the train.​

Answer 1

Answer:

> (210+x)/25=(122+x)/17 = speed of the train

-> (210+x)*17=(122+x)*25

-> 210*17+17x=122*25+25x

-> (210*17) - (122*25) = 8x

-> x= 65

So the length of the train is 65m

The speed of the train = (210+65)/25 or (122+65)/17 =11m/sec