The ratio of the three numbers of a, B and C is 3:8:5, the number of B is 20, what are the two numbers of a and C?

A 20x3 / 8 = 7.5
C 20x5 / 8 = 12.5

RELATED INFORMATIONS

1. What is the sum of the two numbers a and B, and what is the difference between them
2. It takes 3 minutes for a to process parts, 3.5 minutes for B, and 4 minutes for C. now 1825 parts are allocated to them, and they are required to complete them at the same time. How many parts should each person complete?
3. The mass ratio of grain stored in warehouse A and warehouse B is 8:7. After 8 tons are taken out of the warehouse and put into warehouse B, the mass ratio is 4:5?
4. 1. Master Liu took money to buy screws. If he bought all the bolts, he could buy 200. If he bought all the nuts, he could buy 200. How many sets of screws could master Liu buy? 2. There are 10 questions in a mathematics test paper. The scoring rules are as follows: 10 points for one correct question, 2 points for one wrong question. Xiaoming answered all 10 questions, but only 76 points. Think about it, how many questions did he answer correctly 3. At 9:40 a.m., car a is 110 kilometers away from Fuzhou, car B is 90 kilometers away from Fuzhou, and at 10:50 a.m., the distance between car a and Fuzhou is three times that between car B and Fuzhou. At this time, how many kilometers is there between car a and Fuzhou?
5. A unit plans to load trees on both sides of the two roads leading to the two competition venues. Now it has transported back a batch of seedlings. It is known that the length of one road is more than 6000 meters longer than that of the other road. If one tree is planted every 4 meters, it will be 2754 less. If one tree is planted every 5 meters, it will be 396 more. How many seedlings are there? (I know this question is very simple, Could you tell me the basic idea and method of doing this problem
6. Use the numbers 1, 2, 3, 4, 5, 6, 8, 12 and 24 to fill in the small circle of the graph, so that the product of the multiplication of the three numbers on each line is equal
7. What's the next number in the series 6 17 - 5 28 - 16? A,17 B,-5 C,-71 D,39
8. Observation sequence 2 / 3, 3 / 7, 4 / 11, 1 / 3, x, 7 / 23, 8 / 27 Then the value of X should be 6 / 19. If it is arranged according to this rule, the 16th number is ()
9. Two 7's, two 3's make up a formula. Equal to 24? Who knows how to do it?
10. Xiaoming can finish a story book in 10 days, but Xiaojun can finish it two days earlier than Xiaoming. Xiaoming reads three pages less than Xiaojun every day? Xiaoming can finish a story book in 10 days, but Xiaojun finishes it two days earlier than Xiaoming. Xiaoming reads three pages less than Xiaojun every day. How many pages does this story book have?
11. It is known that the ratio of the number of a, B and C is 3:4:5. The number of a is 16 less than that of C. what is the number of B
12. Among the students reading in the reading room, there were 15 more boys than girls. Later, the number of boys decreased by two fifths and that of girls by one fifth. The number of the remaining boys and girls was equal. How many students were reading in the reading room? [equation solution]
13. The number of male workers in a workshop is 2 / 3 of the number of female workers. The number of female workers is a few percent of the number of male workers, and the number of female workers accounts for a few percent of the number of the whole workshop
14. If the number of people in each row is the same, how many people are there at most? How many rows are there for men and women? There are 36 girls and 48 boys If the number of people in each row is the same, how many people are there at most? How many rows are there for men and women? There are 36 girls and 48 boys
15. A cement plant plans to produce 800 tons of cement per month, but actually 950 tons of cement per month, which is several percent higher than the original plan
16. The two cars run from east to west at the same time. Car a runs 56 kilometers per hour, and car B runs 48 kilometers per hour. They meet after 4 hours How many kilometers apart?
17. When the plane flies between cities a and B, the downwind speed is a kilometer per hour, and the upwind speed is B kilometer per hour, then the wind speed is a kilometer per hour______ Kilometers
18. Both a and B cars run at a constant speed on the straight road. The speed of a car is 1.5 times that of B car. The distance of a car is only 2 / 3 of that of B car They say that some time is better than others?
19. If the speed of a car from city a to city B is increased by 20%, it can arrive at city B one hour earlier than the original time; if the speed is increased by 30% after driving 100 km at the original speed, it can arrive at city B one hour earlier than the original time______ Kilometers
20. The total weight of the two baskets of apples is 93 kg, one fourth of which is 15 kg more than one seventh of that of the second basket. How many kg do the two baskets weigh? I want to solve the problem and the answer, to check the right line, a good answer, I give you points! Pay attention! I don't want X and y to solve this problem, because we haven't learned how to use y to solve it! The way we do these problems is to regard the whole as 1. Please learn from me to do this problem!