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Option 2 : 560
Calculation:
Energy consumed in 1st shift = 30 × 8 = 240 kwhr
Energy consumed in 2nd shift = 25 × 8 = 200 kwhr
Energy consumed in 3rd shift = 15 × 8 = 120 kwhr
∴ Total energy consumed by factory in a day
= 240 + 200 + 120 = 560 kw - hr
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