Question
Fresh grapes contain 90% water and dried grapes contain
20% water. From 20 kg of fresh grapes, how many kgs of dried grapes can be obtained?Solution
Let the weight of dry grapes obtain from 20 kg of fresh grapes is Y kg According to the question The quantity of water in 20 kg of fresh grapes is 20 × 90% 18 kg The remaining weight of 20 kg of fresh grapes is 20 - 18 2 kg Now, 2 kg of weight is equal to 80% of dry grapes, then Y × 80% = 2 Y = (2 × 5)/4 Y = 2.5 kg ∴ The required weight of dry grapes is 2.5 kg.
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