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pompa = 5x
kipas angin = 3x
((5x × 4) + (3x × 4)) × 30 = 48000 watt
(20x + 12x)×30 = 48000 watt
32x × 30 = 48000 watt
960x = 48000 watt
x = 48000 watt / 960
x = 50 watt
pompa = 50 × 5 = 250 watt
kipas = 50 × 3 = 150 watt
jadi jawabanya D