1) Janet and Cindy traveled from town m to town n at uniform speeds of 95 km/h and 104 km/h respectively, at the same time. Some time later, they were 15 km apart. How long have they been traveling?
2)Edwin and Winston set off town x to town y at uniform speeds at the same time. When Edwin reached town y, Winston was sill 210 km away. 3 hours later, Winston also reached town y. If the two towns were 560 km apart, at what speed was Edwin traveling?
3) Henry and Tom started driving from the same place but in the opposite directions along a straight road. 4 hours later, they were 680 km apart. If Henry was driving at an average speed of 65 km/h, at what average speed was Tom traveling?