search
Q: A boy standing by the side of a railway track finds that an up-train crosses him in 8 sec and a down-train of twice the length of that of the up-train crosses him in 20 sec. How long (in seconds) will the two trains take to cross each other?
  • A. 15
  • B.
    option image
  • C. 20
  • D.
    option image
Correct Answer: Option B -
answer image

Explanations:

explanation image