Math 6 - Lesson 5.2B. Real-World Problems, Rates and Unit Rates

There are 1,600 kilocalories in the 5 cups of dog food that Mike gives his adult dog. Mike gives his puppy 2 cups of the same dog food. How many kilocalories are there in this 2-cup serving?

• 640 kilocalories

• 320 kilocalories

• 160 kilocalories

• none of those

The table shows the postal charges for sending letters to Country Y. How much does it cost to send a letter weighing 60 grams to Country Y?

• $1.20

• $1.80

• $1.70

• $1.50

A vehicle traveled at a speed of 54 kilometers per hour for 3 hours. Find the distance traveled.

• 18 kilometers

• none of those

• 57 kilometers

• 162 kilometers

A pigeon can fly at a speed of 84 kilometers per hour.

How long does it take the pigeon to fly 7 kilometers?

• 1/7 hour

• none of those

• 12 hours

• 588 hours

Karen walks home from school at a speed of 5 kilometers per hour. She takes 12 minutes to reach home. What is the distance between her school and her home? (Hint: Convert the time from minutes to hours.)

• 1/5 kilometer

• 60 kilometers

• 2.4 kilometers

• 1 kilometer

Kayla ran from her home to a beach at a speed of 6 meters per second. The distance from her home and the beach was 756 meters. How long did she take to run from her home to the beach?

• 4,536 seconds

• 756 seconds

• none of those

• 126 seconds

Kayla ran from her home to a beach at a speed of 6 meters per second. The distance from her home and the beach was 756 meters. If Kayla wants to take 18 fewer seconds to reach the beach, at what speed must she run?

• 7 meters per second

• 5 meters per second

• 8 meters per second

• none of those

Car A travels 702 miles on 12 gallons of gasoline. Car B travels 873 miles on 15 gallons of gasoline. David wants to buy a car with the lowest fuel consumption. Find out the distance traveled by each car per gallon of gasoline. Then tell which of the two cars, A, or B, David should buy.

• Car B

• Car A

• Either one

Post A and Post B are 120 meters apart. Post B and Post C are 300 meters apart. Ben cycled from Post A to Post B in 15 seconds. Then he cycled from Post B to Post C in 55 seconds. Find Ben’s average speed for the distance from Post A to Post C.

• 4 meters per second

• 8 meters per second

• 6 meters per second

• none of those

Mr. Alan drove for 2 1/5 hours at a speed of 70 kilometers per hour. He then drove another 224 kilometers. He took 5 hours for the whole journey. What was Mr. Alan’s average speed for the whole journey?

• 70 kilometers per hour

• 154 kilometers per hour

• 378 kilometers per hour

• none of those