Year 9 Rates

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Year 9 Rates

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A car travels 147 km in 3 hours. The average speed is

1 point

49 km/h

441 km/h

47 km/h

144 km/h

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Betty can type 28 words per minute. At this rate, how many words can Betty type in 5.5 minutes?

1 point

154

157

159

162

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Lily left work at 5 pm and arrived home at 7 pm. Which of the following do we need to know to calculate the average speed for her journey?

1 point

Her speed at 6 pm.

The number of stops on the way home and the time spent at each stop.

The distance travelled from work to home.

Her greatest and least speeds during the journey.

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Sam takes 3 minutes 10 seconds to walk one lap of the local park.
Walking at the same rate, how long will Sam take to walk 10 laps?

1 point

30 minutes 10 seconds

31 minutes

31 minutes 40 seconds

32 minutes

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Nathan left on a journey at 11 am. He travelled 234 km and arrived at his destination at 1:15 pm.
What was his average speed for the journey, to the nearest kilometre per hour?

1 point

104

109

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Four athletes run at different speeds when training.
Tuan runs 1 km every 8 minutes.
Jake runs at 100 metres per minute.
Ahmed runs at 8 kilometres per hour.
Carlo runs at 2 metres per second.
Whose training speed was the fastest?

1 point

Tuan’s

Jake’s

Ahmed’s

Carlo’s

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A tap drips 8 times per second.
Five drops make 1 mL.
How much water drips in 1 hour?

1 point

2.4 L

5.76 L

96 L

144 L

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The distance between Bricktown and Koala Creek is 75 km. A person travels from Bricktown to Koala Creek at an average speed of 50 km/h.
How long does it take the person to complete the journey?

1 point

40 minutes

1 hour 25 minutes

1 hour 30 minutes

1 hour 50 minutes

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Veronica can type 28 words per minute. At this rate, how many words can Veronica type in 5.5 minutes?

1 point

154

157

159

162

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The practice range at a golf course charges $4.00 for a bucket of 40 golf balls. At this rate, how much will a bucket of 100 golf balls cost?

1 point

$10

$10.50

$13.50

$16

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It takes a machine 12 minutes to fill 200 bottles of soda. At this rate, how many minutes will it take the machine to fill 500 bottles of soda?

1 point

25 minutes

28 minutes

30 minutes

40 minutes

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Trish’s resting heart rate is 50 beats per minute. For every minute she exercises, her heart rate increases 5 beats per minute.
How long will it take her to reach a heart rate of 120 beats per minute?

1 point

5 minutes

14 minutes

34 minutes

70 minutes

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Sheila has been given 5 minutes to solve 20 arithmetic problems. What is the minimum rate Sheila can work in order to finish in time?

1 point

1 problem per minute

2 problem per minute

4 problem per minute

5 problem per minute

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What is the speed in m/s of a car that travels 30 km in 20 minutes?

1 point

1500 m/s

150 m/s

90 m/s

25 m/s

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