Question

is this a right anser

Answer 1

it's wrong...
$2\pi \: r = 154 \\ r = 154 \times 7 \div 2 \times 22$
$r = 49 \div 2$

Answer 2

$hello \: dear \:$

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$no \: dear \: its \: wrong$
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The write answer is



$2\pi \: r = 154 \\ \\ r = 154 \times 7 \div 2 \times 22 \\ \\ r = 49 \div 2$
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