L = 616 cm2 brp diameternya ?

L = 616 cm2 brp diameternya ?

Jawaban:

Penjelasan dengan langkah-langkah:

dik: L= 616cm²

dit: d?

jawab:

L=Π×r²

$616 = frac{22}{7} times {r}^{2}$

${r}^{2} = 616 div frac{22}{7}$

${r}^{2} =616 times frac{7}{22}$

${r}^{2} = 196$

$r = sqrt{196 } \ r = 14$

$r = d div 2 \ 14 = d div 2 \ d = 14 times 2 \ d = 28$