） 1. Xiaoming has RMB 9.1 with a face value of 20 cents and 50 cents. It is known that the number of the two kinds of RMB is the same. How many are there in each of the two kinds of RMB? 2. A and B depart from the same station in the opposite direction at the same time, driving for 2.5 hours. The distance between the two vehicles is 225 kilometers. A runs 39 kilometers per hour, and B runs how many kilometers per hour? Answer in detail (write down every step clearly, answer both questions)

） 1. Xiaoming has RMB 9.1 with a face value of 20 cents and 50 cents. It is known that the number of the two kinds of RMB is the same. How many are there in each of the two kinds of RMB? 2. A and B depart from the same station in the opposite direction at the same time, driving for 2.5 hours. The distance between the two vehicles is 225 kilometers. A runs 39 kilometers per hour, and B runs how many kilometers per hour? Answer in detail (write down every step clearly, answer both questions)

1. There are two kinds of RMB, each with X Yuan
（0.2+0.5）*X=9.1
0.7X=9.1
X=9.1/0.7
X = 13 (sheet)
A: there are 13 of each
2. Set car B to travel x kilometers per hour
（39+X）*2.5=225
39+X=225/2.5
X=90-39
X = 41 (km)
A: car B runs 41 kilometers per hour