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# Ratio, Scale and Proportion

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If a car travels 300 km in 3 hours, what is the ratio of kilometers to hours? 100:1
• If there are 4 apples for every 6 oranges in a fruit basket, what is the ratio of apples to oranges? 2:3
4:6
3:4
1:2
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• A map uses a scale of 1 cm to 100 km. How far apart are two cities if the distance between them on the map is 3 cm? 300 km
100 km
30 km
3 km
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• In a recipe, the ratio of cups of flour to cups of sugar is 2:1. If you use 4 cups of flour, how many cups of sugar do you need? 2 cups
3 cups
1 cup
4 cups
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• A scale model of a car is made at a scale of 1:24. If the actual car is 4.8 meters long, how long is the model? 20 cm
2 cm
24 cm
200 cm
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• The ratio of boys to girls in a class is 3:2. If there are 15 boys, how many girls are there? 10 girls
20 girls
5 girls
15 girls
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• A photograph is enlarged to twice its original width and height. What is the ratio of the area of the enlarged photo to the original? 4:1
1:4
1:2
2:1
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• In a proportion, if a/b = c/d, and a = 8, b = 4, c = 2, what is the value of d? 1
2
8
4
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• For every 5 red beads, there are 15 blue beads. What is the ratio of red beads to the total number of beads? 1:3
3:4
2:5
1:4
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• A model airplane has a wingspan of 18 cm. If the actual airplane has a wingspan of 36 metres, what is the scale of the model? 1:20
1:18
1:3
1:54
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• If 3 kg of flour is needed for 12 cakes, how many kg of flour are needed for 4 cakes? 1 kg
3 kg
4 kg
2 kg
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• A drawing uses a scale of 1 inch to 3 feet. If a wall in the drawing is 2 inches long, how long is the actual wall? 6 feet
9 feet
3 feet
12 feet
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• The ratio of dogs to cats in a pet shop is 5:3. If there are 40 animals in total, how many dogs are there? 25 dogs
15 dogs
30 dogs
10 dogs
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• If the ratio of the width to the length of a rectangle is 1:2 and the length is 20 cm, what is the width? 10 cm
40 cm
5 cm
20 cm
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• A scale drawing of a building is made with a scale of 1:100. If the height of the drawing is 0.5 m, what is the actual height of the building? 50 m
10 m
5 m
100 m
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• To maintain a balanced diet, the ratio of fruits to vegetables should be 3:4. If you eat 12 fruits, how many vegetables should you eat? 16 vegetables
12 vegetables
9 vegetables
8 vegetables
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• A mixture requires a ratio of water to cement of 3:1. If you have 9 liters of water, how much cement do you need? 3 liters
9 liters
6 liters
12 liters
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