Sebuah kapsul amoxcilin berbentuk tabung. jari - jari 0.5 cm. jika luas seluruh kapsul adalah 2
cm². maka panjang kapsul adalah sebesar......... cm
A. 1,5
B. 2,0
C. 3,0
D. 3,5
A. 1,5
B. 2,0
C. 3,0
D. 3,5
Takamori37
Dengan demikian:
![$\begin{align}L&=2\pi r^2+2\pi rt \\ 2\pi&=2\pi r(r+t) \\ 1&=r(r+t) \\ 1&=0,5(0,5+t) \\ 2&=0,5+t \\ t&=2-0,5 \\ t&=1,5$ cm\ \ [A]\end{align}](https://tex.z-dn.net/?f=%24%5Cbegin%7Balign%7DL%26%3D2%5Cpi+r%5E2%2B2%5Cpi+rt+%5C%5C+2%5Cpi%26%3D2%5Cpi+r%28r%2Bt%29+%5C%5C+1%26%3Dr%28r%2Bt%29+%5C%5C+1%26%3D0%2C5%280%2C5%2Bt%29+%5C%5C+2%26%3D0%2C5%2Bt+%5C%5C+t%26%3D2-0%2C5+%5C%5C+t%26%3D1%2C5%24+cm%5C+%5C+%5BA%5D%5Cend%7Balign%7D "$\begin{align}L&=2\pi r^2+2\pi rt \\ 2\pi&=2\pi r(r+t) \\ 1&=r(r+t) \\ 1&=0,5(0,5+t) \\ 2&=0,5+t \\ t&=2-0,5 \\ t&=1,5$ cm\ \ [A]\end{align}")
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