tlong dijawab ya plizzz klo yg bisa njawab segera caranya harus yaa

r = 42 : 2 = 21
[tex]v1 = \pi \times r {}^{2} \times t[/tex]
= 22/7 × 21 × 21 × (45 - 25)
= 22 × 3 × 21 × 20
= 27.720 Cm3

r = 28 : 2 = 14
[tex]v2 = \pi \times r {}^{2} \times t[/tex]
= 22/7 × 14 × 14 × 25
= 22 × 2 × 14 × 25
= 15.400 cm3

Volume gabungan :
V1 + V2 = 27.720 + 15.400
= 43.120 cm3 (c)