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672 cm2 = 1/2.16.12.t
672 cm2 = 96 . t
t = 672/96
= 7 cm.
4. Lp = La.t
108 cm2 = 1/2 . 3.4 . t
108 cm2 = 6.t
t = 108/6
= 18 cm.
*maaf yg lain ga tau