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Let the total work be 60 units. (LCM of 15 and 20) Efficiency of A = 60/15 = 4 units/day Efficiency of B = (60/20) × (70/100) = 21/10 units/day Ratio of the efficiency of A : B = 4 : 21/10 = 40:21 Share of A = (40/61) × 1220 = Rs.800
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OCR stands for __________
In computers, DVD stands for:
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