A person finds a thief walking in the opposite direction on the bus. After 10 seconds, he gets off the bus and chases the thief. If his speed is twice as fast as the thief and slower than the car (4/5), how many seconds will it take to catch up with the thief?
某人在公交汽车上发现一个小偷向相反方向步行，10秒钟后他下车去追小偷，如其速度比小偷快一倍，比汽车慢(4/5)则追上小偷要多少秒．
<result>110</result>