Afraah N

23 Februari 2024 10:55

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Afraah N

23 Februari 2024 10:55

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tolong di jawab ya kakak kakak :D

tolong di jawab ya kakak kakak :D

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Sumber W

Silver

23 Februari 2024 18:47

Jawaban terverifikasi

<p>1. r = 7 cm</p><p>&nbsp; &nbsp; &nbsp;t = 10 cm</p><p>&nbsp; &nbsp; ๐žน = 22/7</p><p>&nbsp; &nbsp; a. Luas alas</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;L. alas = ๐žน x r<sup>2</sup></p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 22/7 x 7 x 7</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 154 cm<sup>2</sup></p><p>&nbsp; &nbsp; b. Luas atas</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;L. atas = L. alas</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 154 cm<sup>2</sup></p><p>&nbsp; &nbsp;c. Luas Selimut</p><p>&nbsp; &nbsp; &nbsp; &nbsp; L. Selimut = 2 x ๐žน x r x t</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 2 x 22/7 x 7 x 10</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 440 cm<sup>2</sup></p><p>&nbsp; &nbsp;d. Luas Permukaan&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; L. Permukaan = L. alas + L.atas + L.Selimut</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 154 + 154 + 440</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 748 cm<sup>2</sup></p><p>&nbsp;</p><p>2. t = 28 cm</p><p>&nbsp; &nbsp; &nbsp;d = 14 cm</p><p>&nbsp; &nbsp; &nbsp;r = d : 2 = 14 : 2 = 7 cm</p><p>&nbsp; &nbsp; &nbsp;๐žน = 22/7</p><p>&nbsp; &nbsp; &nbsp;L = 2๐žนr(r + t)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 2.(22/7).7(7 + 28)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 44 x 35</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 1.540 cm<sup>2</sup></p><p>&nbsp; Jadi, Luas seng yang diperlukan adalah 1.540 cm<sup>2</sup></p>

1. r = 7 cm

     t = 10 cm

    ๐žน = 22/7

    a. Luas alas

         L. alas = ๐žน x r2

                       = 22/7 x 7 x 7

                       = 154 cm2

    b. Luas atas

         L. atas = L. alas

                          = 154 cm2

   c. Luas Selimut

        L. Selimut = 2 x ๐žน x r x t

                              = 2 x 22/7 x 7 x 10

                              = 440 cm2

   d. Luas Permukaan 

        L. Permukaan = L. alas + L.atas + L.Selimut

                                      = 154 + 154 + 440

                                      = 748 cm2

 

2. t = 28 cm

     d = 14 cm

     r = d : 2 = 14 : 2 = 7 cm

     ๐žน = 22/7

     L = 2๐žนr(r + t)

         = 2.(22/7).7(7 + 28)

         = 44 x 35

         = 1.540 cm2

  Jadi, Luas seng yang diperlukan adalah 1.540 cm2


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