3 years ago

Rock can read 10 books in 30 minutes. How long does it take rock to read 15 books, if the speed is consistent?

1 answer:

3 0

Divide 30 by 10 to see how long it takes him to read 1 book (30/10=3). Then multiply 3 by 15 to see how long it takes him to read 15 books (3x15=45). It takes Rock 45 minutes to read 15 books :)

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