Jawab dengan benar kak

Jawab dengan benar kak

C. 7 cm

Diketahui

– Volume = 770 cm³

– Tinggi = 15 cm

Ditanya

Jari²

Dijawab

$sf : Volume = frac{1}{3} timespi times {r}^{2} times t$

$sf : 770 = frac{1}{3} times frac{22}{7} times {r}^{2} times 15$

$sf : 770 = frac{22 }{21} times {r}^{2} times 15$

$sf : 770 div frac{22}{21} = {r}^{2} times 15$

$sf : bcancel{ 77 {0}^{35} } times frac{21}{ bcancel{22} } = {r}^{2} times 15$

$sf : 735 = {r}^{2} times 15$

$sf : {r}^{2} = frac{735}{15}$

$sf : {r }^{2} = 49$

$sf : r = sqrt{49}$

$sf : r = underline{ boxed{ red{ sf : 7 : cm}}}$

$~$

▶ Kesimpulan :

$_______________________________$

Penjelasan dengan langkah-langkah:

v = 1/3πr²t

770 = 1/3 × 22/7 × r² × 15

770 = 15/3 × 22/7 × r²

770 = 5 × 22/7 × r²

770 × 7/22 = 5 × r²

35 × 7 = 5 × r²

245 = 5 × r²

245/5 = r²

49 = r²

r = √49

r = 7 cm

opsi c