Aptitude - Problems on Trains - Discussion

Yes fathima you are write.

Hi all, i've solved this problem in anotha way

given,

time=30 sec and speed=45km i.e 45x5/18

so im finding the distance= time x speed = 30 x 225/18 = 375m

thus,the distance travelled by the train is 375m and the length given was 130m

so 375-130 = 245m

Now my question is..could someone insist me that the method followed by me is the right one?

Hi Uvitha,



Speed=25/2 m/sec



then we find the lenght of the bridge using the formula



distance/time = speed



where distance = length of train + x



Time = 30 sec & speed = 25/2

130 + x   25

------- = --

  30      2

=> 245 m

I have solved this problem in a different way, is this right way to solve?
speed=25/2 m/sec
length of the bridge be x m
total distance = speed * time
x + 130 = 30 * 25/2
x + 130 = 375
x = 245 m
is the above method to solve this problem right?

Please help.

Can you explain me in detail ?