200: 180= 10:9 the distance ratio when Party A and Party B meet.
150× (10+9) (10-9) = 2850kma: the distance is 2850km.
A car and a motorcycle leave from A and B at the same time. Cars travel 65 kilometers per hour and motorcycles travel 40 kilometers per hour. When the car travels between two o'clock, it is still 75 kilometers away from the motorcycle. How many kilometers is it between A and B?
75÷(65-40)=3 hours (65+40) × 3+75 = 390km A: The distance is 390km.
3. Both Party A and Party B start from the starting point and go in the same direction at the same time. A walks 6 kilometers per hour, B walks 1 km in the first hour, 2 kilometers in the second hour, and then walks 1 km more every 1 hour than the previous hour. How long will it take B to catch up with A?
It takes x hours to catch up with the armor.
( 1+x)×x÷2=6x
Then x= 1 1.
A: 1 1 hour and catch up with a.
The fast and slow cars start from the same place at the same time and catch up with the cyclist in front along the same highway. It took the two cars 6 minutes and 10 minutes to catch up with the cyclist. It is known that the express train travels 400 kilometers per minute and the local train travels 320 meters per minute. How many kilometers does a cyclist walk per minute?
400×6=2400 m 10×320=3200-2400=800 m 800÷( 10-6)=200 m.
A: Cyclists walk 200 meters per minute.
5. Party A, Party B and Party C deposit in the bank. The deposit of Party C is 65,438+0.5 times the average deposit of both parties, and the sum of both parties is 2,400 yuan. How much do A, B and C save on average?
2400 ÷ 2×1.5 =1deposit of 800 yuan c (1800+2400) ÷ 3 =1400 yuan.
A: The average deposit is 1400 yuan.
6. The school plans to make 50 big skipping ropes with a roll of rope, each of which is exactly 5.5 meters long. Now I have made 30 pieces, and the rest will be made into small skipping ropes, each 2 meters long. How many small skipping ropes can you make? (Answer in two ways)
Method 1: 5.5× (50-30) =110m110 ÷ 2 = 55.
Method 2: 5.5× 50-5.5× 30 =110m110 ÷ 2 = 55.
A: You can also do 1 10.
7. Cars A and B start from 20% of the distance of 470km. A car travels 38 kilometers per hour, B car travels 40 kilometers per hour, and B car starts two hours before A car leaves. How many hours after the A car was expelled, it met the B car?
(470-40×2)÷(38+40)=5 hours
It will take another five hours to answer it.
8. A car starts from A with a speed of 50 kilometers per hour. Two hours later, a motorcycle began to catch up with the car from A. Four hours later, the motorcycle overtook the car. Find the speed of motorcycle.
50× 2 =100km
100 ÷ 4 = 25km Motorcycles are faster than cars.
25+50 = 75km
The speed of a motorcycle is 75 kilometers per hour.
9. The candy store mixed 2 kilograms of toffee, 3 kilograms of fruit candy and 5 kilograms of cowhide candy into assorted candy, but there was no toffee 12.4 yuan per kilogram. How much is the fruit candy per kilogram of 6.8 yuan?
The last question, the condition is weak.