Jawabanmu

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2014-05-28T15:32:05+07:00
Sepertinya
V=1/3*A*T
84=1/3*21*t
84=7*t
84/7=t
12=t
2 5 2
2014-05-28T15:34:48+07:00
Dik: Luas alas = 21cm^2
       Volume = 84cm^3
Dit: t=...?
Jb:  V = 1/3.La.t
       84=1/3.21.t
       252 = 21t
       t=252/21
       t=12cm
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