Solve the questions about rates. You may use a calculator.
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Question 19
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Petra works on an assembly line. She can paint the eyes on 300 dolls in 1 hour. How many can she paint in 15 mins? (Write the number of dolls)
Question 20
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James and Lucinda caem from England to Canada on holiday. The rate of exchange for their money was $2.50 Canadian to £1.00 in England. How many Canadian dollars would James get for £20.00?
Question 21
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If you earned $399 in 3 weeks, how much money do you earn each week?
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Question 26
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Express as a rate. George typed 60 words in 1 min.
15 mins/words
30 elephants/owls
60 words/min
90 questions/test
Express as a unit rate. Betty cycled 30 km in 2 hours.
10 km/h
15 km/h
30 km/h
45 km/h
Express as a unit rate. Elsie delivered 220 flyers in 4 hours.
11 flyers/h
12 flyers/h
50 flyers/h
55 flyers/h
Express as a unit rate. A plane flew 150 km in 15 mins.
10 km/min
12 km/min
14 km/min
15 km/min
Find the unit price. Milk costs $4.50 for 4 liters.
$1.13 /L
$1.50 /L
$2.33 /L
$3.85 /L
Is the following a rate or ratio?
The car was travelling at 60 km/h.
rate
ratio
Is the following a rate or ratio?
Katie earns $8/h at her part-time job.
rate
ratio
Is the following a rate or ratio?
The punch has 3 cups of cranberry juice and 4 cups of ginger ale.
rate
ratio
Is the following a rate or ratio?
The soccer team won 25 games and lost 15 games.
rate
ratio
Find the unit price. 24 cans of pop cost $9.99 for4 liters.
$0.15 /can
$0.25 /can
$0.38 /can
$0.42 /can
Ribbon costs $1.44 for 3 m. What is the cost per metre?
$0.22 /m
$0.48 /m
$0.56 /m
$1.80 /m
Monique worked as a cleaner. She was paid $84 for an 8 hour day. This meant that her hourly rate was $10.50/h.
How much money would Monique make for 35 hours of work?
$256.50
$350.00
$367.50
$429.50
A 400-g package of cheese costs $4.80. The cost of cheese per gram is $0.012/g.
What is the cost of 250g of cheese?
$3.00
$4.20
$5.60
$300.00
The sailfish is the fastest swimmer, reaching speeds of up to 109 km/h. What is that speed in m/s? There is 1000 m in a kilometer, and 60 seconds in a minute, 60 minutes in an hour. (hint: multiply by 1000 and divide by 60, then divide by 60 again).
30.3 m/s
1.81 m/s
1810 m/s
3030 m/s
A bald eagle can fly at a top speed of 50 km/h. What is that speed in m/s? There is 1000 m in a kilometer, and 60 seconds in a minute, 60 minutes in an hour. (hint: multiply by 1000 and divide by 60, then divide by 60 again).
9.5 m/s
11.7 m/s
13.9 m/s
833 m/s
A pitcher throws a baseball at 40 m/s. What is that speed in km/h? There is 1000 m in a kilometer, and 60 seconds in a minute, 60 minutes in an hour. (hint: do the opposite of the above question;divide by 1000 and multiply by 60, then multiply by 60 again).
128 km/h
144 km/h
345 km/h
560 km/h
A cockroach can travel at a speed of 1.5 m/s. What is that speed in km/h? There is 1000 m in a kilometer, and 60 seconds in a minute, 60 minutes in an hour. (hint: do the opposite of the above question;divide by 1000 and multiply by 60, then multiply by 60 again).
5.4 km/h
6.7 km/h
12.8 km/h
15.2 km/h
The graph shows how a cyclist travelled in 3 hours. What was the average speed of the cyclist?
15 km/h
25 km/h
30 km/h
40 km/h
Which is a better buy, 12 bags for $1.99 or 48 bags for $5.29?
12 bags, because the price would get about 6 bags per dollar.
48 bags, because the price would get about 9 bags per dollar.
They would be the same price, because they have the same unit price.
Which is a better buy, 2 rolls for $0.99 or 6 rolls for $3.99 or 12 rolls for $4.99?
A - 2 rolls, because you could buy about 2 rolls per dollar.
B - 6 rolls, because you could buy about 1.5 rolls per dollar.
C - 12 rolls, because you could buy about 2.4 rolls per dollar.
What is the greater rate? (who would make more money?)