Question
Anna has 400 cm of lace. She sews the lace around 7 identical square-shaped cushion covers. If she uses 84 cm of lace on each cushion cover, how much lace does she need to buy?
3 m

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Anna has 400 cm of lace. She sews the lace around 7 identical square-shaped cushion covers. If she uses 84 cm of lace on each cushion cover, how much lace does she need to buy?