Solving Real-Life Rational Equations for 8th Graders

A recipe calls for 3/4 cup of sugar for every 2 cups of flour. If you want to make a batch with 6 cups of flour, how much sugar do you need?

• 1 cup of sugar

• 3 cups of sugar

• 1 1/2 cups of sugar

• 2 1/4 cups of sugar

A car travels 120 miles in 2 hours. If it continues at the same speed, how long will it take to travel 300 miles?

• 5 hours

• 3 hours

• 6 hours

• 4 hours

A tank can be filled by a pipe in 5 hours and emptied by another pipe in 10 hours. If both pipes are open, how long will it take to fill the tank?

• 5 hours

• 15 hours

• 10 hours

• 20 hours

If 1/3 of a number is equal to 12, what is the number?

• 18

• 24

• 30

• 36

A store sells pencils for $0.50 each and erasers for $0.75 each. If you buy a total of 10 items for $6.00, how many of each item did you buy?

• 4 pencils and 6 erasers

• 5 pencils and 5 erasers

• 6 pencils and 4 erasers

• 7 pencils and 3 erasers

A swimming pool can be filled in 4 hours by one hose and in 6 hours by another. How long will it take to fill the pool if both hoses are used together?

• 2.4 hours

• 5 hours

• 1.5 hours

• 3 hours

If the ratio of boys to girls in a class is 2:3 and there are 15 girls, how many boys are there?

• 20

• 12

• 5

• 10

A recipe requires 2/5 cup of oil for every 3 cups of flour. How much oil is needed for 9 cups of flour?

• 1 cup of oil

• 1.5 cups of oil

• 1.2 cups of oil

• 3 cups of oil

A train travels at a speed of 60 miles per hour. How far will it travel in 2.5 hours?

• 150 miles

• 180 miles

• 200 miles

• 120 miles

If 5/8 of a pizza is left and you want to share it equally among 4 friends, how much pizza will each friend get?

• 1/4

• 1/2

• 5/32

• 3/8