2. Two cars, A and B, leave from A and B respectively at the same time. After five hours of meeting, they left separately. Three hours later, a car arrived at b, and at this time, b car was still 120 km away from a place. What are the speeds of A and B respectively?
3. The picture below shows the crossroads. A is on the north-south road, driving from north to south, and B is on the east-west road, driving from east to west. A starts at the intersection of two roads1120m north, and b starts at the intersection. Two people start at the same time. After 4 minutes, the distance between A and B is equal to the intersection. (A is still in the north of the intersection at this time) After 52 minutes, they are at the same distance from the intersection. A and B are required to walk several meters per minute.
4. The speed of Party A, Party B and Party C per minute is 30m, 40m and 50m respectively. A and B set out in the same direction at the same time, C set out from B to catch up with A and B, and it took C 65,438+00 minutes to find the distance between A and B.
At 8: 08 in the morning, Xiaoming set off from home by bike. Eight minutes later, his father came after him on a motorcycle and caught up with him 4 kilometers away from home. Then his father went home immediately. When he got home, he went back to chase Xiao Ming. When he caught up with Xiao Ming again, he was just 8 kilometers away from home. What time is it now?
6. As shown in the figure, two small reptiles start from point A and crawl along the edge of the rectangular ABCD in the direction of the arrow. They meet for the first time at point E, which is 32 cm away from point C, at point F, which is 32 cm away from point D 16 cm, and at point G, which is 32 cm away from point A 16 cm, to find the length of the rectangular side AB.
7. On the highway parallel to the railway, a pedestrian and a cyclist go in the same direction. Pedestrians walk 1 meter per second, and cyclists walk 3 meters per second. On the railway, a train came from behind the two men. It takes 22 seconds for a train to overtake a pedestrian and 26 seconds for a cyclist. How long is this train?
8. For the first time, a small boat sailed 56 kilometers downstream and 20 kilometers upstream, which took 12 hours; The second time, at the same time, I sailed 40 kilometers downstream and 28 kilometers upstream. Find the speed of the ship in still water.
9. Students from Class A and Class B visit the airport 24 kilometers away from the school. They have a car and can only have one class at a time. In order to get to the airport as soon as possible, the two classes agreed that Class A should take the bus first, Class B should walk first and set off at the same time. Students in Class A should get off and walk to the airport, and the bus should return immediately to pick up students in Class B who are walking on the road. It is known that the walking speed of Class A and Class B is the same, and the speed of cars is seven times that of walking. Ask how many kilometers away from the airport the bus should return to pick up students from Class B, so that students from both classes can arrive at the airport at the same time.
10. There is a three-digit number, and the number on the tenth digit is equal to the sum of the number on the second digit and the number on the hundredth digit; The sum of the number in one bit and the number in ten bits is equal to 8; After the number in the hundred digits is exchanged with the number in the single digits, the three digits obtained are 99% larger than the original number. Find this three-digit number
Sugar, how many pieces of fruit candy are there in this plate?
12. Party A and Party B walk in opposite directions at the same time, and meet on the way four hours later.
A fraction of the distance we can get to B?
13. Two containers A and B contain 400 liters of water and 50% alcohol respectively. Pour half of the alcohol solution from B for the first time, then pour half from A to B after mixing, and then pour half from B to A after mixing. How many liters of pure alcohol does A contain at this time?
14. Party A, Party B and Party C jointly built the fence, and Party A and Party B jointly built it for 6 days, and the wall was repaired.
It took them five days to finish it, and their salary was 1620 yuan. How much should Party A take according to the actual workload?