An engineer is planning a new water pipe installation. The circular pipe has a diameter of d = 20 cm d=20 cmd, equals, 20, start text, space, c, m, end text. What is the area A AA of the circular cross section of this pipe? Give your answer in terms of pi

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Answer:

Step-by-step explanation:

d = 20

r = 0.5d

r = 10cm

A = πr^2 = 100π cm^2

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