With the completion of the road reconstruction from Hechuan to Taihe, the mileage has been shortened from 36 kilometers to 30 kilometers, and the speed has been increased from the original average of 30 kilometers per hour to an average of 40 kilometers per hour. How many minutes less travel time than the original?
随着合川到太和的公路改造完成，通行里程由36千米缩短为30千米，车速由原来的平均每时30千米提高到平均每时40千米．行车时间比原来少用多少分钟？
<result>27</result>