1 Answer

Astex · Answer 1 · 2019-02-16T05:00:36+0000

it's abvious he round

$\pi$
as 3.14 so we write the formula and equal it to 25.12 which is:
25.12=2πr
then put 3.14 instead of

$\pi$
there you go! we got a equation
then r is 4

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