Question

find thecircumferenceof a circle whose dimeter is 86 cm​

Answer 1

Answer:

Step-by-step explanation:

d=86 cm

so,r=d/2

     =86/2=43 cm

  therefore,circumference of the circle=2*pie*r

                                                                =2*22/7*43

                                                                =1893/7

                                                                =270.428 cm (approx)

Answer 2

$radius = \frac{diameter}{2} \\ = \frac{86}{2} cm \\ = 43cm$

$circumference \\ = 2\pi \: r \\ = 2 \times \pi \times 43 \\ = 2 \times \frac{22}{7} \times 43 \\ = 270.3cm \: approx$