Find the equivalent amount of the three drugs 3 marks 18 On a certain day a

# Find the equivalent amount of the three drugs 3 marks

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Find the equivalent amount of the three drugs. (3 marks) 18. On a certain day a student spends 1 / 4 of the time reading and 1 / 12 of the time eating. He spend ½ of the remaining time sleeping. What fraction of the day did he spend sleeping? (3 marks) 19. If a = 5 , b = 9 and c = 1, evaluate. 7

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3a + c 2 b – 1 (3 marks) 20. A car clealer reduces the price of a car from sh 546000 in the ratio 11: 13. What was his new selling price? (3 marks) 21. The ratio of the number of boys to the number of girls who attended a book exhibition was 4 to 5. If there were 3200 boys at the exhibition, how many girls were there? (3 marks) 8
22. The total mass of two pigs and 12 goats is 241.64kg. The mass of the two pigs is 145.364g. Find the average mass of each goat to the nearest 1kg. (3 marks) 23. Express the following as a single fraction in its lowest form. (3 marks) a. 4p 3 r _ 2r 2 p 2pr – 3r 2 p 2pr – 3r 2 p 9

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b. x + y _ x – y _ 1 (3 marks) 9x 6y 24. A motorist traveling at 120km/h took 2 hours to complete a certain journey. If she traveled at 80 km /h, how long would she have taken to complete the same journey? (3 marks) 10
25. Take a number n, double it and add five to the result. If result is double a gain, the new number Is 22. Find n . (3 marks) 26. Tom spends 2 / 5 of his salary on food, 1 / 3 of the remainder on electricity and saved the rest. What fraction of his salary did he save? If he spent sh. 1200 on food, how much did he spend on electricity. (4 marks) 27. The diagram below shows a plot of land made up of two semicircles with different centres. The diameters of the semi circles are 14 metres and 35 metres. 11

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If pegs were put at intervals of seven metres all the way round, how many pegs were used? (Take л = 22 / 7 ) (3 marks) 28. The floor of a room measures 8m by 4m. Square tiles measuring 20cm by 20cm are used to covered the floor. How many of these tiles are needed? (3 marks) 12
• Fall '18
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