Question

The circumference of a circle is 440cm. Find its radius and diameter pier = 22/7

Answer 1

Hi !!!!!!

Here is your answer,

Given :- circumference of a circle is 440cm.

$= > 2\pi r = 440 \\ \\ = > 2 \times \frac{22}{7} \times r = 440 \\ \\ = > \frac{44}{7} \times r = 440 \\ \\ = > r = 440 \div \frac{44}{7} \\ \\ = > r = 440 \times \frac{7}{44} \\ \\ (440 \div 44 = 10) \\ \\ = > r = 10 \times 7 \\ \\ = > r = 70$
radius (r) = 70cm

diameter = 2r = 2 X 70 = 140cm


Hope it helps !!!!!!!

Answer 2

hey.....

$circumference \: of \: circle \: = 2\pi \: r$
$440 \: cm {}^{2} \: = 2 \times 22 \div 7 \: \times r \\ 440 \: cm \times 1 \div 2 \: \times 7 \div \: \: 22 \\ 10 \times 7 = r \\ 70 \: = r$

dimeter =2 × radius
= 2 × 70
=140.