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17.06.2021 •
Mathematics
If 12 girls can sweep a room in 20hours, how many hours will it take 8 girls to perform the same task, assuming they are sweeping at the same rate?
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Ответ:
30 hour
Step-by-step explanation:
girls time
12 20 hour
8 x(let)
now,
12/8=x/20
12×20=8×x
240=8x
x=240/8
x=30,,
Ответ:
-21
Step-by-step explanation:
When dealing with negatives and subtracting you are basically adding them together