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In crushing a certain ore, the feed is such that 80% is less than 50.8 mm...

In crushing a certain ore, the feed is such that 80% is less than 50.8 mm in size and the product is such that 80% is less than 6.35 mm. The power required is 89.5 kW. What will be the power required using the same feed so that 80% of product is less than 3.18 mm?

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