Susanna can work 10 math problems in 15 minutes. How many can she work in an hour and a half?

2 answers:

7 0

Well this one is easy!
10 ~ 15
20 ~ 30
30 ~ 45
40 ~ 60
50 ~ 75
60 ~ 90
90 = 1 hour and 30 minutes! < 60 math problems.

docker41 [41]3 years ago

4 0

She can work 60 in an hour and a half. We find this by figuring out how many minutes are in an hour and a half (there are 90 minutes), dividing that number by 15 (which equals 6), and multiplying that number by 10 (which equals 60). 60 problems is the answer.

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