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jari jari = 7 cm
= 22/7 × 7 × 7 × 32
= 22/1 × 1 × 7 × 32
= 154 × 32
= 4928
38. harga setelah diskon = 124.000
diskon = 20%
berapa sebelum diskon ?
= 124.000 : 20/100
= 124.000 × 100/20
= 124.000 × 5
= 620.000
39. = 1/2 × 8 × 26
= 1/1 × 4 × 26
= 104
40. 3/4 = 75/100
= 0,75 + 1,2
= 1,95
= 3 × 0,4 = 1,2
= 1,95 - 1,2
= 0,75
Semoga membantu yaw