Jawabanmu

2014-09-04T22:38:22+07:00
V_{tabung} =  \pi  r^{2 \frac{x}{y} }.t \\  V_{1/2 bola}= \frac{1}{2}. \frac{4}{3} \pi  r^{3}   \\  V_{1/2bola} = \frac{2}{3}  \pi  r^{3}

99 \pi m^{3} = V_{tabung} + V_{1/2 bola} \\ 99 \pi m^{3} = \pi r^{2}.12m + \frac{2}{3} \pi r^{3} \\ 99 \pi m^{3} = \pi.r^{2}(12m+ \frac{2}{3} r )
kedua ruas dibagi   \pi

99 m^{3}= r^{2} (12m+ \frac{2}{3}r)
kedua ruas dibagi  12m+ \frac{2}{3}r