Question

Please answer steep by step
Brainliest marking guaranteed

Answer 1

Step-by-step explanation:

see the above pic hope it helps

Answer 2

Answer:

$r\:=\:10\frac{1}{2}\:=\frac{21}{2}$

(i)

$s = 4\pi {r}^{2} \\ = 4 \times \frac{22}{7} \times {( \frac{21}{2}) }^{2} = 1386 \: {unit}^{2}$

(ii)

$s = 4\pi {r}^{2} \\ \implies {r}^{2} = \frac{s}{4\pi} = \frac{616}{ 4 \times \frac{22}{7} } = \frac{616 \times 7}{4 \times 22} \\ \implies {r}^{2} = 49 \\ \implies \: r = \sqrt{49} = 7 \: unit$