Bantuin kerjain, mtk​

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Bantuin kerjain, mtk​

Bantuin kerjain, mtk​

Jawaban:

8. B. 748

Penjelasan dengan langkah-langkah:

=2xπxrx(r+t)

=2×22/7x7x(7+10)

=2×22/7x7x17=748

8. Diketahui:

tinggi tabung = 10 dm

diameter lingkaran = 14 dm

jari-jari = 14 : 2 = 7 dm

Ditanya:

berapa luas permukaan tabung?

Jawab:

L = 2 × π × r × ( r + t )

= 2 × 22 × 7 × ( 7 + 10 )

7

= 2 × 22 × 7 × 17

7

= 2 × 22 × 1 × 17

= 2 × 22 × 17

= 44 × 17

= 748 dm² (B)