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30 July, 22:42

Craig grades 9 test every 22 minutes if craig has 63 tests to grade how long will it take him?

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Answers (2)
  1. 30 July, 23:12
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    Do tests over minutes. 9/22=63/x and cross multiply to solve. 63 times 22 is 1386. Divide that by 9. That equals 154. It took Craig 154 minutes to grade 63 tests.
  2. 31 July, 01:33
    0
    It will take him 110 minutes.

    If he grades 9 tests every 22 minutes, this means that 63 tests / 9 tests = 7 times

    This means that he needs to do it 5 times in order to grade all of the tests.

    7 X 22 min (amount of time needed to grade 9 tests)

    154 min

    or 2 hours 34 min
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