Twocars, 400

400 kilometersapart, begin driving toward each other on along, straight highway. One car travels 105

105 kilometers per hour and the other 95

95 kilometers per hour. At the sametime, acanary, starting on onecar, flies back and forth between the two cars as they approach each other. If the canary flies 140

140 kilometers per hour and spends no time to turn around at eachcar, how far has it flown when the carscollide?