What is the radius of the Brazilian coin that has a circumference of 84.78 mm?

Question

asked Mar 9, 2021 233k views

1 Answer

Mike Boddin · Answer 1 · 2021-03-13T23:58:12+0000

Answer:

r =
$(84.78)/(2 \pi)\\$ ≈ 13.493 mm

Explanation:

The formula for the circumference c of a circle is

$c = 2 * \pi * r$ ,

where r is the radius.

Dividing both sides of the equation gives

$(c)/(2 \pi) = r$ .

Plugging in c = 84.78 gives you the Answer.