Question

A train 154 meters long is running at the speed of 70 km.400 meter per hour. How long will it take to cross a bridge 176 metre long

Answer 1

The back of train will have to cover a total of 154 + 176 = 330 m

speed of train = 70.km 400m /h

=70400 m/h

= 70400/3600 m/s

= 19.5 m/s

time taken = 330÷19.5

= 16.875 s ans

Answer 2

$\:\:\:\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \huge\mathcal{\bf{{\underline{\underline{\huge\mathcal{...Answer...}}}}}}$

$\underline{\large\mathcal\red{solution}}$

length of the train is =154m

speed of the train

=70.4km/hr

=(70400/3600)m/sec

the lenght of the bridge=176m

now ...

time taken by the train to cross the bridge

$\frac{154 + 176}{ \frac{70400}{3600} } sec \\ = \frac{330 \times 3600}{70400} \\ = 16.875 \: seconds$

time taken by the train to cross the bridge is =16.875 seconds

$\underline{\large\mathcal\red{hope\: this \: helps \:you......}}$