A man is standing on a railway bridge which is 180 m long.
A man is standing on a railway bridge which is 180 m long. He finds that a train crosses the bridge in 24 seconds but himself in 8 seconds. Find the length of the train and its speed.
Answer/Solution
11.25 m/sec
Steps/Work
If length of train is l and speed of train is s, then
l/s = 8
(l+180)/s = 24
(l+180)/l = 24/8 =3
l+180 =3*l
2*l= 180
l=90 mtrs
s= l/8 = 90/8 = 11.25 m/sec
ANSWER:C
l/s = 8
(l+180)/s = 24
(l+180)/l = 24/8 =3
l+180 =3*l
2*l= 180
l=90 mtrs
s= l/8 = 90/8 = 11.25 m/sec
ANSWER:C