A Train With 90 Km/h Crosses A Bridge In 36 Seconds. Another Train 10

1.	A Train With 90 Km/h Crosses A Bridge In 36 Seconds. Another Train 100 Metres Shorter Crosses The Same Bridge At 45 Km/h. What Is The Time Taken By The Second Train To Cross The Bridge ?
Answer» TRAIN A, Speed = 90kmph =90(5/18)m/s = 25m/s = 25m/s, t=36s LET length, L = x+y = timespeed = 2536 = 900m =800m, Speed= 45(5/18) = (25/2) m/s t= (Distance/Speed) = (800/(25/2)) = (1600/25) = 64 seconds Train A, Speed = 90kmph =90(5/18)m/s = 25m/s = 25m/s, t=36s Let length, L = x+y = timespeed = 2536 = 900m =800m, Speed= 45(5/18) = (25/2) m/s t= (Distance/Speed) = (800/(25/2)) = (1600/25) = 64 seconds

A Train With 90 Km/h Crosses A Bridge In 36 Seconds. Another Train 100 Metres Shorter Crosses The Same Bridge At 45 Km/h. What Is The Time Taken By The Second Train To Cross The Bridge ?

Answer»

TRAIN A, Speed = 90kmph

=90*(5/18)m/s = 25m/s = 25m/s, t=36s

LET length, L = x+y = time*speed = 25*36 = 900m

=800m, Speed= 45*(5/18) = (25/2) m/s

t= (Distance/Speed) = (800/(25/2)) = (1600/25) = 64 seconds

Train A, Speed = 90kmph

=90*(5/18)m/s = 25m/s = 25m/s, t=36s

Let length, L = x+y = time*speed = 25*36 = 900m

=800m, Speed= 45*(5/18) = (25/2) m/s

t= (Distance/Speed) = (800/(25/2)) = (1600/25) = 64 seconds