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Mathematics, 13.04.2020 06:46 jpsaad00

84) Working alone, Lisa can dig a 10 ft by 10
ft hole in six hours. One day her friend
Norachai helped her and it only took 2.73
hours. How long would it take Norachai
to do it alone?

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84) Working alone, Lisa can dig a 10 ft by 10
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