Question

Find the circumference of a circle whose area is 64cmsquare​

Answer 1

Given :-

Find the circumference of a circle whose area is 64cm²

Solution :-

• Given, that area of the circle is 64 cm²

    ⇒ πr² = 64

    ⇒ $\sf\frac{22}{7}$r² = 64

      ⇒ r² = $\sf\frac{64 \times 7}{22}$

   ⇒ r ≈ 4.512

• Now, we know that circumference = 2πr

    ⇒ Circumference = 2 × $\sf\frac{22}{7}$ × 4.512 = 28.36 cm

∴ The circumference of the circle is 28.36 cm

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