Jawabanmu

2014-03-24T17:48:18+07:00
Llingkaran = π × r2
3850 = 22/7 × r2
r2 = 22/7 × 1/3850 = 25
r = √25 = 5
2 5 2
2014-03-24T18:36:11+07:00
Lingkaran = 22/7 .r²
r² = 22/7 x 1/3.850=25
r = √25=5
1 4 1