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= s² + 4.1/2.a.t
= 30² + 4.1/2.30.25
= 900 + 1500
= 2400 cm²
Lp Limas = L atas + 4 L sisi tegak
= (s x s) + (4 x 1/2 x a x t)
= (30 x 30) + (4 x 1/2 x 30 x 20)
= 900 + 1200
= 2100cm²