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Class 8 Mathematics Revision Questions and Answers on Ratio and Proportion

In this session, we are going to solve questions on class 8 ratio and proportion topic. The revision questions are ideal for those preparing for KCPE exam. Answers are well explained in video format.

Lessons (20)

1. To plaster a house,sand and cement were mixed in the ratio 5:1. If 24 bags of cement each weighing 50kg were used,how much was amount of sand used in tonnes?
5m 3s
2. Mumbua and Njeri each made a 20kg mixture of maize and beans.Mumbua mixed maize and beans in the ratio3:2.Njeri mixed maize and beans in the ratio 1:3.How many more kilograms of beans did Njeri use than Mumbua?
4m 9s
3. A blanket is made by joining 80 squares of 3 different colours ;blue, green and yellow,in the ratio 2:3:5 respectively. One ball of wool is used to make four such squares. How many balls of green wool are used for one blanket?
2m 51s
4. A painter mixed blue and yellow and yellow powder so that there weights were in the ratio 3:2. The Total weight of the mixture was 30kg.What was the weight ,in kilograms of yellow powder used?
2m 10s
5. There were 420 people attending a meeting. The ratio of men and women was 3:4. Later,60 men and 40 women left the meeting.What was the ratio of men to women who remained?
3m 2s
6. The ratio of sheep to goats to cows is 3:5:2.There are 36 cows. What is the total number of goats and sheep?
1m 46s
7. The ratio of boys to girls in a school is 7:8. If there are 168 boys, how many pupils are there in the school altogether?
2m 25s
8. In her farm,Wambui had goats,sheep and cows in te ratio 5:3:2.At the beginning,she had 50 animals but later sold them leaving her with 36.If the numbers of goats,sheep and cows that remained were in the ratio 2:1:1,how many sheep did he sell?
3m 21s
9. A sum of money was shared between M’mukindia and Ntonyiri in the ratio 3:7.If Ntonyiri got sh 12 more than M’mukindia, how much did M’mukindia get?
1m 36s
10. In a school the ratio of boys to girls is 3:2.There are 400 pupils in the school. During an athletics competition, #1/8# of the girls took part. How many girls did not take part?
3m 4s
11. A watch loses 5 seconds every hour. If it is set right on Wednesday at 12:10 a.m ,what time would it show the following Wednesday at 12:10 a.m?
4m 3s
12. A cube whose sides measures 3cm,weighs 1kg 80g.What is the weight of a similar cube whose sides measures 4cm
3m 31s
13. My watch loses one second in every two hours. If I set it right on Monday at 12:00 noon,what time will it show on the following Saturday at 12:00 noon?
3m 24s
14. A rectangular container of length 15cm and width 10cm has #1200cm^3# of water. More water flows into the container at the rate of #60cm^3# per second.What will be the height of the water in the container after 5 seconds?
3m 15s
15. In a factory every 7kg of coffee berries ,when processed,produce 1kg of clean coffee beans .Leitich ended up with 2100kg of clean coffee beans.How many tonnes of coffee berries had he sent for processing?
2m 53s
16. To complete a project in 48 days a construction company requires 12 employees.How many more employees would the company require if the project is to be completed in 36 days?
3m 31s
17. It takes 8 people 10 days to make 40 sweaters.How many more days would it take 5 people to make the same number of sweaters if they all worked at the same rate?
3m 11s
18. A certain job is completed by 120 people in 12 days.If only 80 people turned up for the job,how many more days will it take to complete the job?
2m 55s
19. Ten men are paid sh 5000 for working 5 days.How much will 8 men get for working 20 days if the payment is at the same rate?
2m 41s
20. In a factory,4 machines fill 900 packets of milk in 15 minutes.H ow many packets will 6 such machines fill in the same period?
2m 53s

Class 8 Mathematics Revision Questions and Answers on Ratio and Proportion

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