Two trains of equals length, running in opposite direction, pass a pole in 48 and 24 seconds. The trains will cross each other in-

Question: Two trains of equals length, running in opposite direction, pass a pole in 48 and 24 seconds. The trains will cross each other in-

Solution:
Let,
the length of both train be = a meters
Speed of the first train = (a/48) m/s
and speed of the second train = (a/24) m/s

When running in opposite directions, relative speed = (a/48) + (a/24)
= (a + 2a)/48
= 3a/48
= a/16

Now,
to cross each other, distance to be covered = (a + a) = 2a meters

∴ the two train will cross each other = (2a)/(a/16)
= 32 sec