(390.3-362.9)/362.9* 100%=7.6%
A: The number of tourists visiting Beijing in 2005 increased by 7.6% compared with 2005.
2. A motorcade delivered a batch of relief materials to Wenchuan disaster area, 80 tons on the first day, the remaining 5/9 on the second day, and all of them were delivered on the third day. It is known that the tonnage ratio of the first two days was 23:27. How many tons will be shipped the next day?
Next day delivery =80*27/23=94
A: 94 tons were shipped the next day.
There are two piles of coal. The weight of the first pile is two thirds of that of the two piles. After the first pile used 1, it was still more than the second pile 1 ton. How many tons are there in each pile?
The weight of the first pile is 2/3 of the two piles, indicating that the second pile accounts for 1/3 of the whole, and the first pile is twice as large as the second pile.
Let the first pile be 2x tons and the second pile be x tons.
2x * 3/4 = x+ 1/2 x = 1 2x = 2
Answer: The first coal pile is 2 tons, and the second coal pile is 1 ton.
4. There used to be 250 chickens in Zhang Hong, Li Minghe. After Li Ming sold 40% and Zhang Hong sold 65,438+0, Li Ming had 65,438+00 more chickens than Zhang Hong. How many chickens do they each have?
Let Li Ming have an X.
0.6x= 10+4250-x)/5
x= 150 250-x= 100
Li Mingyou 150 chickens, and Zhang Hongyou 100 chickens.
5. Two cars, A and B, leave from A and B relatively at the same time. The speed of car A is 60 kilometers per hour, and the whole journey of car B is 10 hour. When car B travels all the way 13, the distance from car A to place A accounts for 5/8 of the whole journey. How many kilometers is it between A and B?
When the second car has traveled all the way 13, the driving time =10 *13/24 =130/24.
A driving distance = 60 * 130/24 = 325km.
Whole journey = 325/(5/8) = 520km.
A: A and B are 520 kilometers apart.
6. If a school rents a 45-seat bus for an autumn outing, 15 people have no seats. If you rent the same number of 60 buses, one bus is empty. It is known that 45 buses rent 220 yuan and 60 buses rent 300 yuan. How many students are there in this school? How to rent is economical?
Let's assume that the original rental car is X.
45x+15 = 60 (x-1) x = 5 people =45*5+ 15=240 people.
240/45=5.3 240/60=4
The ratio of two cars is 45: 60 = 3: 4 * * * 240 people.
It's time to rent four 45-seater cars, 1 60-seater car.
Rent = 4 * 220+1* 300 =1180 yuan.
7. The school distributed 368 seedlings to three classes in grade six. 1 class and class 2 have a ratio of 2:3, and class 2 and class 3 have a ratio of 5:7. How many saplings did each class get?
The ratio of saplings obtained from Class One and Class Two is 2: 3 = 10: 15.
The comparison of saplings in Class Two and Class Three is 5: 7 = 15: 2 1.
Category I: 368 *10/(10+15+21) = 80.
Category II: 368 *15/(10+15+21) =120.
Three categories: 368-80- 120= 168.