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19 Four discs, each of radius 1 cm, are cut from a 5 cm by 5 cm cardboard square. Use the value 3.14 for a to find the area of cardboard left over.

19 Four discs, each of radius 1 cm, are cut from a 5 cm by 5 cm cardboard square. Use the value 3.14 for a to find the area of cardboard left over.

Elementary Geometry for College Students
Elementary Geometry for College Students
6th Edition
ISBN:9781285195698
Author:Daniel C. Alexander, Geralyn M. Koeberlein
Publisher:Daniel C. Alexander, Geralyn M. Koeberlein
Chapter8: Areas Of Polygons And Circles
Section8.4: Cicumference And Area Of A Cicle
Problem 13E
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19 Four discs, each of radius 1 cm, are cut from a 5 cm by 5 cm cardboard square. Use the value 3.14 for a to find the area of cardboard left over. 20 One litre of water is poured into a rectangular container. Find the height that the water will rise if the area of the base of the container is 80 cm2.
Transcribed Image Text:19 Four discs, each of radius 1 cm, are cut from a 5 cm by 5 cm cardboard square. Use the value 3.14 for a to find the area of cardboard left over. 20 One litre of water is poured into a rectangular container. Find the height that the water will rise if the area of the base of the container is 80 cm2.
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