A driver travels from sunyani to Kumasi. The distance between the two cities is 40 miles. After 60 minutes, the driver makes a stop at bechem, which is 10 miles from sunyani. Thirty minutes later, he continues the journey to Kumasi in 60 minutes. After resting for 30 minutes he makes a return journey to sunyani in 120 minutes.
1. How long did the driver stay at bechem