= 4π x 4,5^2= 4π x 20,25 = 81π cm^2
V bola = 4/3πr^3 = 4/3π x 4,5^3 = 4/3π x 91,125 = 4π x 30,375 = 121,5π cm3
e. L permukaan bola = 4πr^2
= 4π x 10^2 = 4π x 100 = 400π m^2
V bola = 4/3πr^3 = 4/3π x 10^3 = 4/3π x 1.000 = 1.333,33π m^3
f. L permukaan bola = 4πr^2
= 4π x 15^2 = 4π x 225 = 900π m^2
V bola = 4/3πr^3 = 4/3π x 15^3 = 4/3π x 3.375 = 4π x 1.125 = 4.500π ^3
Baca Juga: Kunci Jawaban IPA Kelas 8 SMP MTs Semester 2 Halaman 162, Soal Uraian Uji Kompetensi Bab 10
2. Berapakah luas permukaan bangun setengah bola tertutup berikut.