Ratio, Rate & Proportion

12 chocolate bars cost R102, how much will 8 bars cost you?

• R153

• R70

• R68

• R32

The SPCA is currently housing dogs and cats in a ratio of 5 to 3. If there are 12 cats, how many dogs are there?

• 12 dogs

• 16 dogs

• 25 dogs

• 20 dogs

If England has a speed limit of 80 miles/hour and South Africa has a speed limit of 120 km/hour, which country has a higher speed limit? (1 mile = 1.60 km)

• They are the same

• South Africa

• England

• Who even sticks to the speed limit

If pump A empties a tank in 3 hours and pump B empties the same tank in 4 hours, how long will they take to empty the tank together?

• 1h43min

• 2h00min

• 3h30min

• 1h71min

A farm exports oranges, lemons and naartjies in a ration of 2:1:4. If the farm exports 22750 fruit each year, how many naartjies does it export?

• 3250

• 13000

• 6500

• 10000

Paarl is 57km from Wynberg and it takes you 45 minutes to get there on Saturday. What was your average speed?

• 80km/h

• 42.75km/h

• 67km/h

• 76km/h

If it takes 10 workers 6 hours to dig a foundation, how long will it take 25 workers to dig that same foundation? (indirectly proportional)

• 2h24min

• 15hours

• 3h30min

• 2h40min

The special curve which is formed when we plot a graph for indirect proportion is a?

• Parabola

• Straight line

• Hyperbola

• Exponential graph

The graph that is formed when we plot two direct proportional variables is a?

• Straight line

• Hyperbola

• Parabola

• Exponential graph

If 300ml of a liquid weighs 450g, how many kilograms will 1,5l of this liquid weigh?

• 2250g

• 2,250kg

• 0,250kg

• 4,5kg