2 years ago

If the area of a circle is 121 pi square units, what is its diameter

Mathematics

2 answers:

postnew [5]2 years ago

8 0

Answer:22

Step-by-step explanation:

diameter=d

Area=121π

area of circle=π x (d/2)^2

121π=π x d^2/4

121π=πd^2/4

Cross multiplying we get

121π x4=πd^2

484π=πd^2

Divide both sides by π

484π/π=πd^2/π

d^2=484

Taking the square roots of both sides we get

d=√(484)

d=22 diameter=22

zzz [600]2 years ago

5 0

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