tolong dong no 10 ama 11 please

#10.a
22/7 × d = 44
d = 44 / (22/7)
d = 44 × 7/22
d = 14
r = 14/2 = 7

V:
 = 22/7 × 7 × 7 × 20
= 22 × 7 × 20
= 3.080 cm³

#10.b
= 2 × luas alas + keliling × tinggi
= 2 × 22/7 × 7 × 7 + 44 × 20
= 308 + 880
= 1.188 cm²

#11
Garis pelukis = √(r² + t²)
= √(14² + 20²)
= √596
= 24,4

Luas permukaan:
= 314/100 × 14 × 244/10 + 314/100 × 14 × 14
= 1.072,624 + 615,44
= 1.688,064

Luas minimal karton = 1.689 cm²