The speed is constant and the distance is proportional to time.

Option 1: Understand from the point of view of scores. Distance Score Completed/Time Completed = Distance Score Remained/Time Required Remained.

Solution: Suppose it takes X hours to complete the rest. 3/5 :2 ==( 1-3/5) :X X=4/3

2: 240× 3/5 = 96 (km) Driving distance: time taken = = remaining distance: remaining required time.

Solution: Suppose it takes X hours to complete the rest. 96:2=(240-96):X X=4/3