1. A driver traveled from Haifa to Eilat He covered a third of the distance at a speed of 75 kph (Kilometers per hour), a fifth of the remaining distance in one hour, and the rest of the distance at a speed of 80 kph. The distance between Haifa and Eilat is 450 kilometers. If the driver had driven the entire distance ar a constant speed at what speed would he have needed to drive so that the joumey from Haifa to Eilat would take exactly the same amount of time? (1) 70 kph (2) 75 kph (3) 80 kph (4) 90 kph