Finding Unit Rates
Finding the Average Speed (Total distance/Total Time)
Which is the Better Buy?
Word Problems Involving Rates and Unit Rates
D = r x t
100
Joey can do 80 recitations of the alphabet in 2 minutes. How many recitations can he do in 1 minute?
40 recitations
100
The distance from Point A to Point B is 10 yards. You walk this distance in 16 seconds. The distance from Point B to Point C is 15 yards. You walk this distance in 9 seconds. What is your average speed?
Average speed = 1 yard per second
100
Monica can either buy 10 bottles of Gatorade for $4.10 or she can buy 12 bottles of Powerade for $4.80. Which is the better buy?
12 bottle of Powerade ($0.40 cents per bottle)
100
A tennis ball machine can launch 60 tennis balls in 12 minutes. At this rate, how many tennis balls can it launch in 36 minutes?
180 tennis balls
100
A car traveled at a speed of 54 kilometers per hour for 3 hours. Find the distance traveled.
Distance = 162 kilometers
200
Kimberly and her friends are jumping rope. Kimberly can do 50 jumps in 25 seconds. How many jumps can Kimberly do in 1 second?
2 jumps
200
Aaliyah's family took 2 hours to drive from City A to City B at a speed of 55 miles per hour. On the return trip, due to a snowstorm, the family took 3 hours to travel back to City A. What was the average speed for the entire trip?
Avg. speed = 44 miles per hour
200
Cinthia can either buy 36 rolls of toilet paper for $18 or she can buy 20 rolls of toilet paper for $9.60. Which is the better buy?
20 rolls of toilet paper is the better buy ($0.48 cents for one roll)
200
Water flows from a faucet at a rate of 5 liters every 25 seconds. At this rate, how much water will flow from the faucet in 45 seconds?
9 liters of water
200
Cesar rides his motorbike at a speed of 65 miles per hour for 3 hours. What distance did Cesar travel?
d = 195 miles
300
Haileen can type 400 words in 25 minutes. What is her typing speed in words per minute?
16 words per minute
300
Herbert drove for 2 hours at a speed of 70 kilometers per hour. He then drove another 220 kilometers. He took 6 hours for the whole journey. What was Herbert's average speed for the whole journey?
Avg. speed = 60 kilometers per hour
300
Arlene is trying to decide which fruit to buy. Apples cost $4.50 for 5 lb, and bananas cost $4.20 for 4 lb. Which is the better buy?
Apples is the better buy ($0.90 per pound)
300
First 20 g: $0.50 Every additional 10 g: $0.30 The information above gives the postal charges for sending letters to the Dominican Republic. How much does it cost to send a letter weighing 60 grams?
$1.70
300
Brandon walks home from school at a speed of 5.5 kilometers per hour. He takes 15 minutes to reach home. What is the distance from his school and his home?
d = 82.5 kilometers
400
Kenneth is paid $125.50 for 5 days of work. How much is he paid per day?
He is paid $25.10 per day
400
The distance between Town A and Town B is 80 miles, and the distance between Town B and Town C is 320 miles. A van takes 2.5 hours to travel from Town A to Town B. It takes another 5.5 hours to travel from Town B to Town C. Find the average speeed of the van for the whole trip.
Average speed = 50 miles per hour
400
Edwin needs to buy a jar of spaghetti sauce. He can either buy a 40-oz jar for $2.40 or a 64-oz jar for $4.48.
40-oz jar for $2.40 is the better buy ($0.06 per ounce)
400
There are 1,600 kilocalories in the 5 cups of dog food that Brenni gives her adult dog. Breanni gives her puppy 2 cups of the same dog food. How many kilocalories are there in this 2-cup serving?
640 kilocalories
400
Dionjah ran from her hotel to the beach at a speed of 6 meters per second. The distance from her hotel to the beach was 756 meters. How long did it take Dionjah to run from her hotel to the beach? Give your answer in minutes and seconds.
t = 126 seconds = 2 minutes 6 seconds
500
6 lb of grapes cost $10.74. What is the unit cost?
The unit cost is $1.79 per pound
500
Freedaisha ran around a 400-meter track two times. It took her 4 minutes to run around the track once, and 6 minutes to run around it again. Find Freedaisha's average speed.
Average speed = 80 meters per minute
500
Britney needs to buy laundry detergent. She can buy 96-oz of Tide for $24 or she can buy 64-oz of Tide for $14.08. Which is the better buy?
64-oz of Tide ($0.22 per ounce)
500
A factory produces 161 cars in 6 hours. At this rate, how many cars will the factory produce in 1 week?
4,508 cars
500
A pigeon can fly at a speed of 84 kilometers per hour. How long does it take the pigeon to fly 336 kilometers?
4 hours
M
e
n
u