tolong di jawab ya kakkk

3. ▪Bangun 1 = 1/4 × 3,14 × 10 ×10
= 1/4 × 314 = 78,5 × 2 (krn ada 2 bangun yg sm) = 157 cm3
▪Bangun 2 = 1/2 × (6+15) × (6+6)
= 1/2 × 21 × 12
= 252/2 = 126 cm3
Total = 157 + 126 = 283 cm3

4. ▪Bangun 1 = 22/7 × 7 ×7
= 154 ÷ 2 (krn setengah lingkaran) = 77 cm3
▪Bangun 2 = 1/2 × 14 × 7
= 49 cm3
Total = 77 + 49 = 126 cm3

Maaf klo salah..
Moga membantu.. ^_^