AMC 10 Step by Step
2007 AMC 10AProblem 3P1-10~1 minPrint

An aquarium has a rectangular base that measures 100100 cm by 4040 cm and has a height of 5050 cm. It is filled with water to a height of 4040 cm. A brick with a rectangular base that measures 4040 cm by 2020 cm and a height of 1010 cm is placed in the aquarium. By how many centimeters does the water rise?

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Problem © Mathematical Association of America (MAA), American Mathematics Competitions. Reproduced for non-commercial educational use. Solution and commentary are original to this site.