Question

The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is

• A. 200 m
• B. 225 m
• C. 245 m
• D. 250 m

Answer 1

The correct option is C 245 m

$Speed=(45\times \frac{5}{18})m/sec$

Time = 30 sec.
Let the length of bridge be x metres.
Then, $\frac{130+x}{30}=\frac{25}{2}$
$\Rightarrow 2(130+x)=750$
$\Rightarrow x=245m$