Jawab no 3 dan 4

<p><strong>3) </strong>luas selimut = &nbsp;550 cm^{2 &nbsp; &nbsp; &nbsp;}r= 7cm&nbsp;</p><p>&nbsp; &nbsp; &nbsp;&nbsp;<strong>𝞹rs </strong>= 550</p><p>&nbsp; &nbsp; &nbsp; 22/7 . 7 . s = 550</p><p>&nbsp; &nbsp; &nbsp; 22 s= 550</p><p>&nbsp; &nbsp; &nbsp; s= 550/22</p><p>&nbsp; &nbsp; &nbsp; s= 25 cm&nbsp;</p><p>&nbsp; &nbsp; &nbsp;luas permukaan = &nbsp;π r (s + r)&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 22/7 . 7 . ( 25 + 7 )</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 22 . 32</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<strong>= 704 &nbsp;cm²</strong></p><p>^&nbsp;</p><p><strong>4) </strong>luas selimut = 188,4 cm^{2 &nbsp; &nbsp;&nbsp;} &nbsp;s= 10 cm</p><p>&nbsp; &nbsp; &nbsp;&nbsp;<strong>𝞹rs&nbsp;</strong> =<strong> </strong>188,4</p><p>&nbsp; &nbsp; &nbsp; 3,14 . r . 10 = 188,4</p><p>&nbsp; &nbsp; &nbsp; 31,4 r = 188,4</p><p>&nbsp; &nbsp; &nbsp; r = 188,4/31,4</p><p>&nbsp; &nbsp; &nbsp; r = 6 cm&nbsp;</p><p>&nbsp; &nbsp; &nbsp; luas permukaan = &nbsp;π r (s + r)&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 3,14 . 6 ( 10+6 )&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 18,84 . 16&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<strong>= 301,44 cm²</strong></p><p>^&nbsp;</p><p>&nbsp;<strong>SELESAI &nbsp;YEY SEMOGA MEMBANTU !</strong> &nbsp;</p>