Tolong dijawab ya pakai cara!!

Penyelesaian :
Nomor 25
Luas permukaan balok
= 2 × ( p × l ) + ( p × t ) + ( l × t )
= 2 × ( 21 × 14 ) + ( 21 × 16 ) + ( 14 × 16 )
= 2 × ( 294 + 336 + 224 )
= 2 × 854
= 1708 cm^2
Opsi => A

Nomor 26
Volume tahung
= phi × r^2 × t
= 22/7 × 12 cm × 12 cm × 52,5 cm
= 23.760 cm^3
= 23,76 liter
Opsi => A

Good Luck :)

25.

LP = 2 ( p×l + p×t + l×t )
2(21×14 + 21×16 + 14×16)
2(294 + 336 + 224)
2(854) = 1.708 cm² (a)

26.

V = π r² t
22/7 × 12 × 12 × 52,5
22 × 12 × 12 × 7,5 = 23.760 cm³ = 23,76 liter (a)