2. Two cars, A and B, leave from two places 426 kilometers apart at the same time. After four hours of meeting, I know that the speed of a car is 54 kilometers per hour. How many kilometers per hour is the B train? (4 points)
3. When the school buys prizes, it will buy 40 diaries of each 6.4 yuan. How many copies can it buy if each copy is 5. 12 yuan? (5 points)
4. Two schools, A and B, have 1000 students. If there are 150 students transferred from A to B, then B has more 100 students than A. How many students are there in School A and School B respectively? (5 points)
5. The picture below shows a trapezoid consisting of a right triangle and a square. It is known that the area of a right triangle is 15 cm2. Find the area of the trapezoid. (5 points)