Jawab ya Nomor 28. Jawab pake cara

1/2 phi r^2 t
1/2×22/7×7×7×14 = 1078

s×s×s
14×14×14 = 2744

Volume total = 2744+1078 = 3822 (B)

volume kubus= sisi × sisi × sisi
= 14cm×14cm×14cm= 2.744 cm3

luas 1/2 tabung = 1/2 × phi × r × r × t
= 1/2 × 22/7 × 7 cm × 7 cm × 14 cm
= 1.078 cm3

volume gabungan =
volum kubus +volum 1/2 tabung
= 2.744 cm3 + 1.078 cm3
= 3.822 cm3

jawaban B