#### Rate, ratio, proportion and speed

1. Four kilogram of potatoes cost R28,45.
1.1 Will 15 kg of potatoes cost more or less?
1.2 Which sort of proportion is this?
1.3 What will 15 kg of potatoes cost?
1.4 How many kilograms of potatoes will cost R77,10?

2. What will 8 pumpkins cost if 3 pumpkins cost R19,26?

3. 34,25 liters of petrol cost R234,61
3.1 What will 68,21 liters of petrol cost?
3.2 How many liters of petrol will cost R816,20?

4. A boy runs 9 km in 36,5 minutes.
4.1 How long will it take him to run 21 km?
4.2 How far does he run in 55,8 minutes?

5. A car travels 53,5 km in 33,4375 minutes.
5.1 What is the speed of the car in km/hour?
5.2 How far will the car travel in 3,5 hours?
5.3 How long will it take to travel 38,7 km?

6. A man jogs at 15 km/h.
6.1 How far does he jog in 1 second?
6.2 How far does he jog in 0,72 hours?
6.3 How long will it take him to jog 48,2 km?

7. Six men dig a piece of ground in 3 days.
7.1 Will more men take longer to dig the piece of ground?
7.2 What kind of proportion is this?
7.3 How long will 15 men take to dig the piece of ground?
7.4 How many men will dig the piece of ground in 2 days?

8. A man cuts 17 slices off a loaf of bread.A child gets 3 slices for supper. How many
children can be fed with 6 loaves of bread?

9. There are 42 sweets in a tin.
9.1 How many children can each get 6 sweets?
9.2 How many sweets will each child get if there are 21 children?

10. A car travels 31,947 km using 2,3 liters of petrol.
10.1 Will more or less liters of petrol be needed to travel 100 km?
10.2 What kind of proportion is this?
10.3 How many liters of petrol is necessary to travel 100 km?
10.4 How far can the car travel using 18.6 litres of petrol?