Hitunglah luas permukaan bola dan volume bola jika di ketahui panjang jari jarinya. a.14cm b.15cm c.21cm d.28cm e.20cm

a) Lp = 4 × π × r²
= 4 × 22/7 × 14 × 14
= 2.464 cm²
V = 4/3 × π × r³
= 4/3 × 22/7 × 14 × 14 × 14
= 11.498,67 cm³

b) Lp = 4 × π × r²
= 4 × 3,14 × 15 × 15
= 2.826 cm²
V = 4/3 × π × r³
= 4/3 × 3,14 × 15 × 15 × 15
= 14.130 cm³

c) Lp = 4 × π × r²
= 4 × 22/7 × 21 × 21
= 5.544 cm²
V = 4/3 × π × r³
= 4/3 × 22/7 × 21 × 21 × 21
= 38.808 cm³

d) Lp = 4 × π × r²
= 4 × 22/7 × 28 × 28
= 9.856 cm²
V = 4/3 × π × r³
= 4/3 × 22/7 × 28 × 28 × 28
= 91.989,33 cm³

e) Lp = 4 × π × r²
= 4 × 3,14 × 20 × 20
= 5.024 cm²
V = 4/3 × π × r³
= 4/3 × 3,14 × 20 × 20 × 20
= 4.784,76 cm³