Problem Solving About Rate and Unit Rate

Which is the unit rate for 72 balls in 24 cans?

• 72 balls per can
• 24 cans per ball
• 3 cans per ball
• 3 balls per can

For which example below is the unit rate 7.5 miles per hour?

• 90 miles in 12 hours
• 75 miles in 5 hours
• 7.5 miles for 7.5 hours
• 90 hours for 12 miles

Which expression can be used to find the unit rate for 96 seedlings in 8 trays?

• 96 ÷ 8
• 8 ÷ 96
• 96 x 8
• 8 + 96

Victor walked 24 blocks in 20 minutes. What is his unit rate?

• 1.2 blocks per minute
• 0.83 blocks per minute
• 4 blocks per minute
• 44 blocks per minute

Find the unit rate and determine which rate is greater: 500 miles in 10 hours or 125 miles in 2 hours.

• 5 mi/1 hr; 6.25 mi/1 hr; 125 miles in 2 hours is greater
• 50 mi/1 hr; 6.25 mi/1 hr; 500 miles in 10 hours is greater
• 50 mi/1 hr; 62.5 mi/1 hr; 500 miles in 10 hours is greater
• 50 mi/1 hr; 62.5 mi/1 hr; 125 miles in 2 hours is greater

Which is the slowest reading rate?

• 3 pages in 9 minutes
• 4 pages in 10 minutes
• 5 pages in 13 minutes
• 7 pages in 20 minutes

Usually, a person's heart rate decreases as a person ages from infancy to adulthood. One family's resting heart rates are shown. If their heart rates are within normal ranges, which person is the youngest?

• Marie: 350 beats in 4 minutes
• Tony: 600 beats in 5 minutes
• Laurin: 800 beats in 8 minutes
• David: 400 beats in 6 minutes

Which unit rate would you use to solve the proportion? x revolutions/18 minutes = 6 revolutions/3 minutes

• 6 minutes per revolution
• 2 minutes per revolution
• 6 revolutions per minute 
• 2 revolutions per minute

Which term completes the proportion? 90 letters/6 people = d letters/15 people

• 6 letters
• 15 letters
• 36 letters
• 225 letters

Willa spends 600 minutes on the phone in 15 days. If the rate remains the same, how many days would it take her to spend 400 minutes on the phone?

• 4 days
• 10 days
• 15 days
• 40 days