Barb is driving from Calgary to Edmonton at a speed of 120 km/h. Frank is travelling from Edmonton to Calgary at a speed of 112 km/h. Edmonton and Calgary are 298 km. How far from Calgary will they pass each other if they leave at the same time? How far from Calgary will they pass each other if Barb begins her journey 20 minutes before Frank?
Let's assign the Calgary as a zero distance point. Then