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1. tentukan luas alas : p x l = 5 x 4 = 20 cm
2. volume = luas alas x tinggi
1800 = 20 x t
t = 1800/20 = 90 cm
panjang = 5x
lebar = 4x
maka
Luas alas =
Jawaban bisa banyak tetapi kalau dibatasi hanya bilangan bulat maka:
Jadi tinggi prisma adalah 10 cm