tolong y dikerjakan nomer 3,4,5 pakai cara tolong cepetan

3) V = La × t
= ½ × a × ta × tp
= ½ × 25 × 20 × 42
= 250 × 42
= 10.500 cm³

4) V = π × r² × t
3.388 = 22/7 × r² × 22
3.388 × 7 = 22 × 22 × r²
23716 = 484 × r²
r² = 23716 ÷ 484
r = √49
r = 7 cm

5) LP = 2 × (pl + pt + Lt)
= 2 × (18.6 + 18.9 + 6.9)
= 2 × (108 + 162 + 54)
= 2 × 324
= 648 cm²

Mapel       : Matematika
Kategori   : Bangun Ruang
Kelas        : Sekolah Dasar
Semester : Ganjil


Pembahasan:
Soal nomer 3 
[tex]V = La × t[/tex]
[tex]V=\frac{a.t}{2}.t [/tex]
[tex]V= 250.42[/tex]
[tex]V= 10.500 cm^3[/tex]

Soal nomer 4
[tex]V = \pi r^2 t[/tex]
[tex]3.388 = \frac{22}{7}r^2.22[/tex]
[tex]3.388.7 = 484. r^2[/tex]
[tex]23.716 = 484 × r^2[/tex]
[tex]r^2= \frac{23.716}{484} [/tex]
[tex]r^2=49[/tex]
[tex]r =\sqrt{49}[/tex]
[tex]r = 7 cm[/tex]

Soal nomer 5 
[tex]L_p= 2(pl + pt + Lt)[/tex]
[tex]L_p= 2(18.6 + 18.9 + 6.9)[/tex]
[tex]= 2(108 + 162 + 54)[/tex]
[tex]= 2(324)[/tex]
[tex]= 648 cm^2[/tex]