Problem Solving with Unit Rate

A store sees 120 customers in 8 hours. What is the unit rate (in customers per hour)?

• 16 customers per hour
• 15 customers per hour
• 12 customers per hour
• 20 customers per hour

After 3 hours, Ernie had travelled 195 miles. If he travels at a constant speed, how far will he have travelled after 5 hours?

• 400 miles

• 325 miles

• 575 miles

• 650 miles

Which is the better buy? A 12-pack of Pepsi for $3.50 or a 6-pack for $1.80?

• The 12-pack

• The 6-pack

• They're the same

• Neither, I prefer Coke

You go to the grocery store to buy dog food. The store has three sizes available:

A 20-lb bag for $23.44

An 8-lb bag for $9.88

A 40-lb bag for $49.00

Which size bag has the lowest cost per pound (lb) rounded to the nearest cent?

• The 8-lb bag

• The 20-lb bag

• The 40-lb bag

• No one knows

Water flows from a faucet at a rate of 5 gallons every 25 seconds. At this rate, how many gallons will flow from the faucet in 45 seconds?

• 9 gallons
• 5 gallons
• 11 gallons
• 40 gallons

A machine can pack 70 boxes of spaghetti in 5 minutes. At this rate, how many boxes can they pack in 8 minutes.

• 35 boxes
• 14 boxes
• 112 boxes
• 560 boxes

Which is the "better buy"?  A 12 ounce can of corn for $1.92 or a 20 ounce can of corn for $3.00?

• They are the same
• The  20 ounce can
• The 12 ounce can

One snowy day, the snow was falling at a rate of 3 inches per hour.  If it kept snowing at the same rate, now many inches would accumulate in 2½ hours

• 7 ½  inches
• 6 ½ inches
• 5 ½ inches

There are 1600 calories in the 5 cups of dog food Mike gives his adult dog. Mike gives his puppy 3 cups of the same dog food. How many calories are in the 3 cup serving?

• 800 calories
• 960 calories
• 640 calories
• 3200 calories

An 8-pack of juice boxes costs $4.79, and a 12-pack of juice boxes cost $6.59. Use this information to calculate the better buy.

• 8 pack
• 12 pack