Question

18.A train moving at a speed of 50 km/hr
cross a bridge 800m long in 1 minute
and 12 seconds, the length of the train is
A) 850m
B) 1000m
C) 1200m
D) 200 m​

Answer 1

$\huge\underbrace\mathbb\red{ANSWER}$

Given :

speed :- 50 km/hr

speed :- 50 km/hr

Length of bridge :- 800m

Time taken :- 1 minute and 12 seconds = 72 seconds

To find :

Length of the Train

Solution :

Speed = 50 km/hr - 50 x 5/18 m/s

{ Here , we know that 1 hr = 3600 s and 1 km = 1000 m ; so 1 km/hr = 1000/3600 = 5/18 }

Distance covered = 125/9 x 72 [ D = S x t ]

= 125 x 8

= 1000 m

# Final answer is 1000 ( Option B )

$\huge{\boxed{\boxed{\underline{\rm{\red{Hope\:it\: helps\: you}}}}}}$