1. Fresh grapes contain 90% water while dry grapes contain 20% water. What is the weight of dry grapes obtained from 20 kg fresh grapes?
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By: anil on 05 May 2019 02.32 am
Let the total weight of fresh grapes be 100 gm. => Fresh grapes have 90 gm of water and 10 gm of fruit. When these grapes are dried, the amount of fruit does not change. => 10 grams will become 80% of the content in dry grapes => Weight of dry grapes = $$frac{10}{0.8}$$ = 12.5 gm So, the weight of fresh grapes reduces to 1/8th of its original weight. => 20 kg of fresh grapes give 2.5 kg of dry grapes.
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