A bridge is 500 meters long. It takes one minute for a train to get on the bridge from the front to the rear. The time for the whole train to be completely on the bridge is 50 seconds Length?

A bridge is 500 meters long. It takes one minute for a train to get on the bridge from the front to the rear. The time for the whole train to be completely on the bridge is 50 seconds Length?

Suppose the length of the train is x meters
（500-x）/50=（500+x）/60
That is 11x = 500
The solution is x = 45.45m
A: the length of the train is 45.45 meters

It takes 40 seconds for a train to cross the 440 meter bridge at the same speed
It takes 30 seconds to cross the 310 meter tunnel. What's the speed and length of the train?

Let the train speed be x m / s
40X-440=30X-310
10X=130
X=13
Speed = 13 m / S
Vehicle length = 40 * 13-440 = 80m

A railway bridge is 4620.8 meters long, and a train is 160 meters long. The speed of the train is 30 meters per second. How long does it take for the train to get on the bridge from the front to leave the bridge from the rear?

(4620.8 + 160) △ 30, = 4780.8 △ 30, = 159.36 (seconds); a: it takes 159.36 seconds for this train to get on the bridge from the front to leave the bridge from the rear