find the radius and circumference of a circle whose area is 144 Pie CM^2
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area of circle=πr²
144π=πr²
r²=144π/π
r²=144
r=√144
r=12cm
circumference=2πr
=2×22/7×12
=528/7
=75.43cm²
ankur112006:
but in my book answer is written circumference is 24pie
Answered by
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Answer:
area of a circle = π * r sq
144 π = π * r sq
∴ r = 12 cm
radius = 12 cm
circumference = 2πr
=2 × π × 12
=24π cm sq. (24×3.14= 75.36 cm sq.)
hope it's helpful..........
hello
I have marked you as brainliest
because your circumference is right but his answer is wrong
thnk u.....
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