Ratios and Rates Word Problems

The ratio of water to cement in a mixture is 2:1. If you have 60 kg of cement, how many kilograms of water do you need?

• 30

• 60

• 90

• 120

A map scale shows that 1 cm on the map corresponds to 4 km in reality. If two cities are 8 cm apart on the map, how far are they in reality?

• 28 km

• 30 km

• 32 km

• 34 km

Evan's favourite hobby is origami. He plans to make 100 paper cranes to hang from the ceiling of his bedroom. Yesterday, he made 28 paper cranes in 4 hours. Today, he made 21 paper cranes at the same rate.

How long did Evan spend making paper cranes today?

• 3 hours

• 4 hours

• 1 hour

If there are 2 cats and 5 dogs what is the ratio of cats to dogs?

• 2:5

• 5:2

• 10:1

What is the ratio of strawberries to the total if there are 20 strawberries and 35 grapes?

• 20:35

• 35:20

• 20:55

Unit rates are....

• ratios whereby the amount given is per 1 unit

• ratios whereby the amount given is per 2 units

• ratios whereby the amount given is per 10 units

To find a unit rate you must

• add

• subtract

• multiply

• divide

Find the unit rate for 10 apples that cost $2.00

• $20.00 per apple

• $0.20 per apple

• $0.50 per apple

What would the proportion look like for the following example? 12 girls have brown eyes and 10 girls have blue eyes.If 72 girls have brown eyes, how many have blue eyes?

• 5

• 15

• 4