Atrain goes past you in 10 seconds and goes past a 100 meter long bridge in 30 seconds. what is the length (in meters) and the speed (in m/s) of the train?

Length = 33.33 m

Speed = 3.33 m/s

Step-by-step explanation:

To find the length of the train, you need to use the ratio between the length of the bridge and the time it takes to pass it.  It takes 30 seconds to pass a 100 meter long bridge.

30/100

Use this ratio with the time it took to pass you to find the length of the train.  Cross multiply and solve for x.

30/100 = 10/x

30x = 1000

x = 33.33 m

The train is 33.33 m long.  To find the speed of the train divide the the distance traveled by the time it took to travel that distance.

100/30 = 3.33 m/s