Question

find the diameter of a circle whose area is 1386 cm square​

Answer 1

Step-by-step explanation:

are of circle = πr²

1386cm² = 22/7 × r²

1386×7/22= r²

441 = r²

√441 = r

21= r

diameter = 2× r

diameter = 2× 21

diameter = 42

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