Question

"Quis"
KERJAKAN!!
soal mudah,boleh cari di Google
(pts 40)​
note:tidak Ada batas usia untuk menjawab

Answer 1

Penjelasan dengan langkah-langkah:

1. k = 154 cm

a. diameter

k = π x d

154 = 22/7 x d

154 x 7 = 22d

22d = 1.078

d = 1.078 : 22

d = 49 cm

b. jari²

r = 1/2 x d

r = 1/2 x 49

r = 24,5

2. r = 28 cm

jarak = 440 m ---> 44.000 cm

jarak = k . putaran

44.000 = (2 x π x r) x n

44.000 = (2 x 22/7 x 28) x n

44.000 = 176 n

n = 44.000 : 176

n = 250 putaran

3. r = 385.000 km

k = 2 x π x r

k = 2 x 22/7 x 385.000 km

k = 2.420.000 km

4. r = 1 dm

1 jam = 1 putaran penuh

k = 2 x π x r

k = 2 x 3,14 x 1

k = 6,28 dm

k = 62,8 cm