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Mathematics, 08.12.2020 03:30 funmi5504

Tim worked on his science fair project about volcanoes for one hour. He spent 15 minutes on decorating his display board and 20 minutes testing his volcano demonstration. What fraction of the hour did tim spend on his display board and volcano, (i need some help on this one)

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Tim worked on his science fair project about volcanoes for one hour. He spent 15 minutes on decorati...
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