



 
Hi Julie, Bruce started by travelling north at 30 km/hr. Two hours later Lucy was ready to start. In the 2 hours Bruce had travelled 60 km so Bruce and Lucy are 60 km apart. $340  60 = 280$ so you want to know the time when the distance between them increases by 280 km. Once Lucy starts moving how fast is the distance between them changing? How long does it take them to increase the distance between them to 280 km? Penny 



Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 