Ratios and Rates Word Problems

John is mixing paint for a large mural. He finds that a ratio of 4 parts blue paint to 7 parts yellow paint gives the perfect shade of green. If he has already used 16 parts of blue paint, how many parts of yellow paint does he need to maintain the ratio?

• 12

• 64

• 20

• 28

A car travels 240 miles in 4 hours. What is the rate of the car in miles per hour?

• 80 miles per hour

• 30 miles per hour

• 60 miles per hour

• 120 miles per hour

If 3 bags of apples cost $12, how much would 5 bags cost?

• $22

• $18

• $20

• $15

John has 5 apples and wants to maintain the same ratio of apples to oranges in his fruit basket. If he plans to add 15 oranges, how many apples (x) should he add to maintain the ratio 3/5?

• x = 9

• x = 12

• x = 18

• x = 5

A recipe calls for 2 cups of flour and 3 cups of sugar. What is the ratio of flour to sugar?

• 2:3

• 1:2

• 2:2

• 3:2

If 4 workers can build a house in 6 weeks, how many workers are needed to build the same house in 3 weeks?

• 8 workers

• 6 workers

• 12 workers

• 10 workers

If a car travels 300 miles in 5 hours, how far can it travel in 8 hours at the same speed?

• 480 miles

• 250 miles

• 550 miles

• 400 miles

If 5 students can complete a project in 10 days, how many students are needed to complete the project in 5 days?

• 7

• 10

• 3

• 12

Cassidy has a bag of 72 red beads and 90 blue beads. She would like to use the beads to make bracelets that have the same ratio of red to blue beads as in the bag. If a bracelet has 15 blue beads, how many red beads does it have? (Number answer only)

For every 3 minutes that Ryan runs on the treadmill, he burns 28 calories. How many calories can he expect to burn if he runs for 24 minutes? (Number answer only)