Question

A train moving with speed 10m/s crosses a bridge of length 500m in 80s the length of the train is_??
A)800 m
B)500 m
C)300 m
D)200 m
E)160 m

Answer 1

hey mate...

here is your answer...

A train moving with speed 10m/s crosses a bridge of length 500m in 80s the length of the train is :

C)300 m.

hope it helps...

please mark as the brainliest...

Answer 2

Given,

Velocity of the train $V= 10 m/s$

Length of the bridge $L = 500 m$

Time taken to cross the bridge $t = 80 s$

We know that,

$speed\_of\_train= \frac{total\_distance\_covered}{total\_time\_taken} \\ \\V = \frac{(length\_of\_train)+(length\_of\_bridge)}{t}$

Here, time taken is the whole time took by the train to totally exit from the bridge. Therefore, total distance covered in $80s$ will the total length of train and bridge.

lets assume length of train = $x$ meters, then

$V = \frac{x+L}{t} \\ \\V*t =x+L\\x = (V*t)-L\\x = (10*80)-500\\x=800-500\\x=300 m$

∴ The correct option is C) 300 m

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