The expressway from Lishan Town to the provincial capital is 189 kilometers long, passing through the county seat. The county seat is 54 kilometers away from Lishan Town. At 8:30 in the morning, a bus departed from Lishan Town to the county seat and arrived at 9:15. After staying for 15 minutes, drive to the provincial capital and arrive at 11:00 am. Another bus drove directly from the provincial capital to Lishan Town at 9:00 am on the same day. Travel 60 kilometers per hour. When the two cars met, how many minutes did the passenger car from the provincial capital bound for Lishan Town travel?
里山镇到省城的高速路全长189千米，途径县城．县城离里山镇54千米．早上8：30一辆客车从里山镇开往县城，9：15到达．停留15分钟后开往省城，午前11：00能够到达．另有一辆客车于当日早上9：00从省城径直开往里山镇．每小时行驶60千米．两车相遇时，省城开往里山镇的客车行驶了多少分钟．
<gadget id="calculator">42 + 30</gadget>
<output>72</output>

<result>72</result>