Rate and Math Problems

Brenda has traveled to another city, and her notations are 270 km in 3 hours. We can state that her average speed (rate) was:

• 85 km/h

• 80 km/h

• 90 km/h

• 95 km/h

(This question has more than one right answer). After a Physical Education class, Tom and Peter have computed their heart rates. Tom calculated 255 heartbeats in 3 minutes and Peter, 320 heartbeats in 4 minutes. Choose all the right answers.

• Tom would have 510 heartbeats in 6 minutes.

• Peter's heart rate is 80 heartbeats / minute.

• "320 heartbeat / 4 minutes" equals "180 heartbeats / 2 minutes"

• Tom's heart rate is greater than Peter

Sam bought 4 t-shirts per $32. His cousin, Alex, wants to buy the same t-shirt, but he will pay $48. How many t-shirts is Alex going to take?

• 5

• 8

• 6

• 7

(This question has more than one right answer.)

An elephant walks 2.5 km in a half hour. Select below the same rates.

• 5 km in 1 hour

• 25 km in 4 hours

• 15 km in 3 hours

• 10 km in 2 hours

A car travels 280 km in 4h. How long is it going to take to travel 840 km?

• 11 h

• 9 h

• 12 h

• 14 h

A truck travels 6 km in 3 min. How many kilometres will the truck travel in 1 hour ?

• 115

• 120

• 125

• 130

Diana runs 16 km every 5 days. To run over 100 km, she will need at least:

• 31

• 32

• 33

• 34

Last year, it took 8 gardeners 12 small squares to fix up. This year, the city has a bigger budget and can hire 32 gardeners. How many small squares are they going to fix?

• 54

• 40

• 48

• 44

Mr. Connor charges $54 per 3 tutoring math classes. How much would Anderson pay for 5 math classes?

• $90

• $86

• $92

• $96

It takes 18 days for some painters to paint 3 houses. How long will it take for the same painters to paint 7 houses?

• 44 days

• 48 days

• 40 days

• 42 days