From 1.8 to 9: 30, he drove 12 kilometers, and he can get his speed of 4 kilometers every half hour, so it takes another hour for the remaining 8 kilometers, that is, 10: 30 can reach the second place.

2.6 days. In 48 yuan, you can get paid for one day's work and deduct 12 yuan for one day's rest, and get the message that 1 day can rest for four days. This cycle is five days, and the answer of dividing 30 by 5 is equal to six days.