Rates and Ratios

A 7-pack of dog treats costs $23.31. What is the unit price?

• $3.33 per pack

• $2.33 per pack

• $3.03 per pack

• $3.23 per pack

$120/h= ___ c/min

Answer explanation

1 hour = 60 minutes

Divide 120 by 60 to convert rate into per minute.

$2/min

$1 = 100c

Therefore rate is

200c/min

Convert 75mL/min to L/day

Callum fills his car with 28L of petrol at 142.7 cents per litre. His change from $50 cash is:

• $10

• $39.95

• $10.05

• $40.05

Bottle A has 1L of cordial drink with cordial to water ratio of 3:7.

Bottle B has 1L of cordial drink with a cordial to water ratio of 1:4. The drinks from both bottles is combined to form a 2L drink. What is the new cordial to water ratio?

The ratio of the width of a rectangle to its length is 5:8. If the perimeter of the rectangle is 78m, find the width.

Marco and Matthew start riding from home into town, which is 30km away. Marco rode at 10km/h and Matthew took 20 minutes longer to complete the trip. Assuming that they both rode at a constant speed, how fast was Matthew riding?

A truck uses 12 litres of petrol to travel 86km. How far will it travel on 42 litres of petrol?

At a market you can trade 2 cows for 3 goats or 3 goats for 8 sheep. How many sheep are 3 cows worth?

At a market you can trade 4 llamas for 5 donkeys or 6 donkey for 8 pigs. How many pigs are 3 llamas worth?