Question

The circumference of a circle is 1,250 cm. What is the approximate length of the diameter of the circle?

Answer 1

Answer:

circumference =2π r

so,1250cm = 2x22/7x r

1250 = 44r/7

=> 1250x7 = 44 r

=> 8750 = 44r

r = 198.8 cm

so diameter = 2r = 2x 198.8 cm = 397.6 cm approx.

Answer 2

Given :

Circumference of circle = 1250 cm

To find :

Diameter of circle

Formula used :

• Circumference = 2πr
• Diameter = 2r

Solution :

First of all we need to find radius of circle.

$\sf \implies \: 1250 = 2\pi \: r$

$\sf \implies \: 1250 = 2 \times 3.14 \times \: r$

$\sf \implies \: \: r = \dfrac{1250 }{ 2 \times 3.14}$

$\sf \implies \: \: r = \dfrac{1250 }{ 6.28}$

$\sf \implies \: \: r = 199.04 \: cm$

Therefore Diameter = 2r

$\sf \implies \: Diameter = 2 \times 199.04 \: cm$

$\sf \implies \: Diameter = 398.08 \: cm$

ANSWER: 398.08 cm