Question

please answer this question 38

Answer 1

here is your answer.
Hope it will help you

Answer 2

$4\pi \: r {}^{2} = 346.5$
$r {}^{2} = 346.5 \times 7 \div (22 \times 4)$
$r {}^{2} = 27.5625$
$r = 5.25cm$