find the diameter of circle whose area is 154m square
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Area of circle = 154 cm^2
Pi ☓ r^2 = 154
r^2 = 154 ☓ 7/22
r^2 = 7 ☓ 7
r = 7 cm
Therefore diameter = 2r = 2 ☓ 7 cm = 14cm
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