The distance between A and B is 90 kilometers. If A and B drive at the same time, they will meet each other in 0.6 hours. If A and B drive in the same direction at the same time, it will take 10 hours. Car A overtakes Car B. How many kilometers per hour does the car travel?
A、B两地相距90千米如果甲、乙两车同时开出，相向而行0.6小时相遇；如果甲、乙两车同时开出同向而行，经过10小时．甲车追上乙车．甲车每小时行多少千米？
<gadget id="calculator">79.5 - 9</gadget>
<output>70.5</output>

<result>70.5</result>