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60a^3 = 1620
a^3=27
a=3
Jadi,panjang=15cm
Lebar=12cm
Tinggi=9cm
PxLxT = Volume
5ax 4a x 3a = 1.620
60a³ = 1.620
a³ = 1.620 /60=27
a =∛27 = ∛3x3x3
a= 3
P= 5a= 5(3)= 15
L=4a=4(3)= 12
T= 3(a) = 3(3) = 9
ukurannya = 15cm x 12cmx 9cm