How much bigger is TR (200) than TR (199)? What is the difference of TR (546) – TR (540)?

Thanks :)

Find the length of cu, the triangles are similar.

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?