A person travels from A to B, if he first rides a motorcycle for 20 minutes, then rides a bicycle for 80 minutes to reach B; if he rides a bicycle for 20 minutes, then rides a motorcycle for 35 minutes, he will arrive at B land. How many minutes does it take him to ride a bicycle from A to B?
某人从甲地到乙地，如果他先骑摩托车行20分，再骑自行车行80分正好到达乙地；如果他先骑自行车行20分，再骑摩托车行35分也正好到达乙地．从甲地到乙地他骑自行车需多少分．
<result>160</result>