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960 = Luas alas x 15
Luas alas = 960 / 15 = 64 cm²
Karena bentuk alas adalah persegi
L = s² = 64
s = √84
s = 8 cm
Luas sisi tegak = 4 x sisi x tinggi = 4 x 8 x 15 = 480 cm²
960=15s²
960.3=15s²
2.880 =15s²
s =√2880/15=
:13,8
tinggi sisi tegak:√6,9²+15²
=√47,61+125
=√862,5
=29,3
luas sisi tegak=4.1/2.13,8.29,3
=808,68
Insyaallah bermanfaat