Question

if the area of plastic plate is 42.6 cm then find its circumference

Answer 1

Area of plastic plate = 42.6 cm²

Since plastic plate is in the shape of circle

Let Radius of circle = r

π r²= 42.6

r²=$\frac{42.6}{3.14}=13.5668$→→→Take π=3.14

$r=\sqrt{13.5668}$

r= 3.6833

r= 3.684 cm

Circumference of circle = 2 π r

                   = 2 × 3.14 × 3.684→→→Take π=3.14

                   = 6.28 × 3.684

                    = 23.13552 cm

                    = 23.14 cm (Approx)

Answer 2

Its circumference  is 23.131 cm

Step-by-step explanation:

Area of circular plate =$\pi r^2$

We are given that the area of plastic plate is 42.6 cm square

So,$\pi r^2 = 42 .6$

$\frac{22}{7} r^2 = 42.6$

$r^2 = \frac{42.6 \times 7}{22}$

$r=\sqrt{ \frac{42.6 \times 7}{22}}$

r=3.68 cm

Circumference of plate = $2 \pi r = 2 \times \frac{22}{7} \times 3.68 = 23.131 cm$

Hence  its circumference  is 23.131 cm

#Learn more:

If the circumference is 176 then find its radius

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