tolong pakai cara no 3,4,5,6

3. Bangun 1
L = p × l = 28 × 22 = 616 cm

Bangun 2
L = alas × tinggi = 22 × 16 = 352 = 176 cm
2 2 2

Jadi , 616 + 176 = 792 cm 2

5. luas 3 bagian lingkaran = 3 × v × r2
4 4

= 3 × 22 × 35 cm × 35 cm
4 7

= 3 × 22 × 5 cm × 35 cm
4

= 3 × 22 × 175 cm
4

= 11.550
4

= 2.887,5 cm2

6. volume = v × r2 × t d = 42
r = 21
= 22 × 21 cm × 21cm × 45 cm
7

= 22 × 3 cm × 21 cm × 45 cm

= 66 × 21 cm × 45 cm

= 1.386 cm2 × 45 cm

= 62.370 cm3

( maaf hanya itu yang bisa saya jawab )
SEMOGA BERMANFAAT