this is what i got when i divide 1. 66666666667 i am not sure please tell me if wrong for me to go over it with my tauter
Answer:

Step-by-step explanation:
Both triangles are shown are similar. Therefore, the ratio of their sides will be maintained. We can then set up the following proportion:

Length of train : 100
length of bridge : 400
distance covered by the train to cross the bridge : (100 + 400) = 500
time taken by the train to cross : 30
speed = distance / time
speed = 500/30
speed = 16.67 meters per second <===
<span>10.6325909767 rounded to the nearest 10th is 10.633</span>