A cruise ship traveled for 282 miles with the current in the same amount of time it traveled 138 miles against the current. If the speed of the cruise ship was 35 mph, what was the speed of the current?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling