Question

Find the circumference of a circle whose area is 1386 cm square

Answer 1

Hey there!!!

$\huge\bold{Solution}$

Given:-

Area of circle = 1386 cm²

find:-

Circumference of circle = ?

Area of circle = πr²

1386 = $\dfrac{22}{7}$r²

r² = $\dfrac{1386×7}{22}$

r² = 441 cm

(r)² = (21)²

r = 21 cm
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Circumference of circle = 2πr

=> 2 ×$\dfrac{22}{7}$×21

=> 132cm

Hence, the required answer is 132cm
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⭐HOPE IT HELPS YOU⭐

Answer 2

Heya!

Answer   :   132 cm

Step-by-step explanation:

Area of a circle = πr² = 1386 cm²

22/7 × r² = 1386

r² = 1386 × 7/22

r² = 126 × 7/2

r² = 63 × 7

r² = 441

r = 21

Radius of the circle = 21 cm

Circumference of the circle = 2πr

= 2×22/7 × 21

= 2 × 22 × 3

= 6 × 22

= 132 cm

Hope it helps..!