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dig 1 = 21 cm
dig 2 = 40 cm
maka :
L = (dig 1 x dig 2) / 2
= (21 x 40)/2
= 840 / 2 = 420 cm²
Luas kertas = 63 x 80
= 5.040
maka 1 kertas dapat membuat layang2 sebanyak = 5.040 : 420 = 12 layang2
jadi harga 1 layang2 = 3000 / 12 = Rp 250
dig 1 = 21 cm
dig 2 = 40 cm
maka :
L = (dig 1 x dig 2) / 2
= (21 x 40)/2
= 840 / 2 = 420 cm²
Luas kertas = 63 x 80
= 5.040
maka 1 kertas dapat membuat layang2 sebanyak = 5.040 : 420 = 12 layang2
jadi harga 1 layang2 = 3000 / 12 = Rp 250