Question

Makasih Yang Udah Jawab :)
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Answer 1

Penyelesaian

• Nomor 8

[tex] \boxed{ \rm L = 4 \times \pi \times {r}^{2} } \boxed{ \rm L = \pi \times {d}^{2} }[/tex]

[tex] \rm Luas = \frac{22}{7} \times 28 \times 28[/tex]

[tex] \rm L = \frac{22}{ \cancel7} \times \cancel{28} {}^{ \: 4} \times 28[/tex]

[tex] \rm L = 22 \times 4 \times 28[/tex]

[tex] \rm L = \boxed{ \red{ \tt 2.464}}[/tex]

[tex] \\ [/tex]

• Nomor 9

[tex] \rm V = \frac{1}{2} \times la \times t[/tex]

[tex] \rm V = \frac{1}{ \cancel2} \times \cancel{78} {}^{ \: 39} \times 16[/tex]

[tex] \rm V = \boxed{ \red{ \tt 624}}[/tex]

[tex] \\ [/tex]

• Nomor 10

[tex] \rm V = ( \frac{1}{2} \times a \times t) \times tΔ[/tex]

[tex] \rm V = ( \frac{1}{ \cancel2} \times \cancel{10} {}^{ \: 5} \times 24) \times 30[/tex]

[tex] \rm V = \boxed{ \red{ \tt 3.600}} [/tex]

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Answer 2

Verified answer

Jawab:

Penjelasan dengan langkah-langkah:

8.  L. permukaan bola = 4 × phi × [tex]r^{2}[/tex]

                                   = 4 × 22/7 × 28 × 28

                                   = 9,856 [tex]cm^{2}[/tex] (D)

9. V = L. alas × t

      = 78 × 16

      = 1,248 ÷ 1/2

      = 624 [tex]cm^{2}[/tex] (A)

10. L. alas = 1/2 × a × t

                = 1/2 × 24 × 10

                = 120 dm

    V = L.alas × t

       = 120 × 30

       = 360 dm = 3600 liter (B)

semoga bermanfaat