Question

if the area of a circle is 154 cm square what is the perimeter of the circle

Answer 1

44cm is the only one right answer

Answer 2

Answer:

44 cm

Step-by-step explanation:

Let the radius of the circle be R

We know that area of circle is π(radius)²

But area given is 154 cm²

∴ π (R)² = 154 cm²

$\frac{22}{7}\times R^2 = 154 cm^2$

$R^2=154cm^2\times\frac{7}{22}$

R² = 7 × 7 cm²

taking square root of both sides

R = 7 cm

Now,

Perimeter of circle = 2π (Radius)

                              $=2\times \frac{22}{7}\times 7$

                               = 44 cm

Hence, perimeter of the given circle is 44 cm