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2. 18 kearah utara
3. 525 cm x 320 cm = 168.000 cm2
Luas keramik 20 x 20 = 400 cm2
Keramik yang dibutuhkan = 168.000 : 400 = 420 buah

4. Luas persegi = 28 x 28 = 784 cm2
Luas lingkaran = π x r x r = 22/7 x 14 x 14 = 616 cm2
Luas yang diarsir = 784 - 616 = 168 cm2

5. Volume tabung = π x r x r x t = 22/7 x 5 x 5 x 105 = 8250 cm2

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