Subtopic: Drying and milling of cereals, pulses and oilseeds
Question Statement:
Fresh potatoes of mass 1000 kg are dried from 14% to 93% total solids. If 7% of original potatoes is lost in peeling, the product yield from fresh potatoes in percent is ______. [answer in integer]
Official Answer Key:
14.0 to 14.0
Step-by-Step Solution & Explanation
Here "14%" and "93%" refer to TOTAL SOLIDS content (initial solids = 14%, i.e., moisture = 86%, typical for fresh potato; final solids after drying = 93%). Mass remaining after 7% peeling loss = 1000×0.93 = 930 kg, still at 14% solids, so solids mass = 930×0.14 = 130.2 kg (peeling removes bulk material without changing the solids fraction of what remains). Since drying removes only water, the solids mass (130.2 kg) stays constant and now represents 93% of the dried product: dried product mass = 130.2/0.93 = 140.0 kg. Yield from fresh potatoes = 140.0/1000×100 = 14.0%, matching the key exactly.
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